SKU: 71458946023

Magenta Bat Detector 4

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Description

Magenta Bat Detector 4Bat Detector 4 With a Magenta Bat Detector you can listen to ultrasonic chirps, smacks and clicks from these amazing creatures. Special circuitry detects the human inaudible sounds emitted by bats and processes them into a form that human hearing can discern. The Magenta Bat4 Bat Detector is a super heterodyne Bat Detector that has some great design features, including high level audio output and built in front facing weatherproof loudspeaker. A small

Bat Detector 4

 

With a Magenta Bat Detector you can listen to ultrasonic chirps, smacks and clicks from these amazing creatures. Special circuitry detects the human-inaudible sounds emitted by bats and processes them into a form that human hearing can discern.

The Magenta Bat4 Bat Detector is a super heterodyne Bat Detector that has some great design features, including high level audio output and built-in front-facing weatherproof loudspeaker. 

A small paper guide is included that assists you in identifying the bat species by frequency.

 
Bat Detector Features:

 

  • Advanced low noise IC preamplifier stage
  • high stability easy tuning linear heterodyne oscillator
  • New audio circuits
  • Increased gain and sensitivity
  • Useable radius upto 100 meters
  • Convenient bottom mounted headphone socket (mutes Loudspeaker)
  • Line level tape recorder socket - constant level regardless of volume control
  • Top lit calibrated frequency dial
  • Built in bright LED torch
  • Edgewise volume and frequency control for one handed operation
  • Wrist strap 

 

Magenta BAT4 Specifications:

  • Type: Heterodyne
  • Frequency Range: 15-130 kHz
  • Bandwidth: +/- 9kHz 
  • Outputs: 3.5mm stereo headphone socket and 3.5mm stereo jack recording socket
  • Output Power: 0.5 Watts
  • Tape Output: 100mV typical
  • Microphone: Wide band electret
  • Speaker: Waterproof low profile mylar
  • Size: 135 x 72 x 27 mm
  • Power: 4 x AAA batteries

There are 17 species of bats resident in the UK, that's more than a quarter of our mammal species. British Bats are insect predators, eating a wide variety of prey including beetles, moths, flies and midges.  Bat population levels and health are considered to be an indicator species of the balance of nature.  Lots of healthy bats, mean lots of invertebrates which rely on healthy vegetation and hence healthy ecosystem.

Although bats have good night vision they locate their prey and objects in the environment by using a pattern of returning echoes from their high frequency ultrasonic calls known as 'echolocation'. Their echolocation skills are so good that they can avoid objects as small as a strand of hair, so there is no likelihood of them touching you whilst they are in flight.

Female bats generally only have one infant per year, forming nursing colonies in trees and buildings in which to raise their young.  During the winter months, there is less insect prey available for bats, so during this time they hibernate in trees, buildings or caves, only emerging occasionally to eat or drink.

It is illegal to disturb or handle a bat without a licence

All British bats and their roosts are protected by UK law and it is an offence to handle or intentionally disturb a wild bat unless you possess the appropriate licence. If a building has a bat roost, the building cannot be developed without first contacting the local authority to ensure the mammals are not compromised. These restrictions are vital to ensure these threatened small mammals are afforded as much protection as possible.

Here are some interesting bat facts:

  • A tiny pipistrelle bat can eat up to 3,000 insects in a night.
  • Bats can live up to 30 years.
  • Bats are more closely related to people than mice.
  • Britain's most common bat, the pipistrelle, is only 4cm long and weighs about 5 grams - less than a 2p coin!
  • Bats do not get dizzy when hanging upside down for hours.
  • Some species like pipistrelle make echolocation calls through their mouths, others like Horseshoe Bats make calls through their noses.


Threats to Bats in Britain

UK bat populations have declined considerably during the past century. They continue to be threatened by various factors including:

  • Loss of feeding habitats and flightlines.
  • Loss of insects to feed on as a result of habitat loss, pesticides.
  • Climate change.
  • Loss of roost sites as a result of building and development work.
  • Artificial light illuminating roosts and delaying emergence of bats, leading to shorter hunting windows for the mammals.


Nest boxes for Bats

Although not as widely used as bird boxes, bats can be offered additional roost sites by the provision of purpose built bat boxes. These can be installed as high as possible on trees or on the side of buildings. The box should face approximately south, away from the prevailing weather, but additional boxes can also be installed on the same tree or nearby to face south-east and south-west to give the bats a choice of roosts to compensate for the position of the sun at different times of the year.

Boxes are most likely to be used if they are placed in an area where bats are likely to feed, such as near rivers and ponds, woodland and parkland.

Gardening for Bats

As natural habitats for bats are threatened, our gardens are playing a more important role in securing a future for bats. Here are some hints to turn your garden into a bat haven.

  • Plant night-scented plants, to attract night flying insects
  • Build a pond
  • Let your garden go a little wild
  • Put up a bat box
  • Create linear features e.g. hedgerows or tree lines
  • Reduce or remove artificial lighting
  • Keep cats indoors at night


Using a Bat Detector to Identify Bats

Identifying bats can be a challenging task, and although common species can be identified with some basic knowledge, an electronic bat detector will greatly aid identification of rarer species.

Bats flying in similar woodland habitats will need similar information to navigate around, and so different species' echolocation calls can sound very familiar. However, away from the roost, their calls become more species specific, and so this is often the best place to use a bat detector to distinguish between different species.

The bat detector transforms the non-audible ultrasonic sounds into sounds that humans can hear. Our Bat Detectors have a wide frequency range, but it is recommended to initially set the detector at 45kHz, as most bats call through this frequency. Then the detector can be tuned above and below this range to identify the peak frequency to which the bat is calling (identified by lower sounds). A note can be made of the tone, rhythm and repetition rate of the bat and then this information compared to reference charts.

British Bat Species


Greater Horseshoe Bat (Rhinolophus ferrumequinum)

This rare species is restricted to South West England and South Wales. With a wingspan of between 290 - 350mm, this large bat roosts in old buildings and caves. It emerges about 40 - 50 minutes after sunset and has slow, fluttering flight with short glides close to the ground along habitat edges or in vegetation.

Bat Detector Information:

Peak frequency range (kHz): 82 (80-84)
Call frequency range (kHz): 64 - 84
Call description: continuous loud bubbling warbling. Calls are very directional and difficult to detect.

Lesser Horseshoe Bat (Rhinolophus hipposideros)

A rare species that is restricted to south west England and South Wales. This small bat has a wingspan of between 192 - 254mm and roosts in old buildings and caves. It emerges 50 - 50 minutes after sunset and has fairly fast and skilful flight close to the ground along habitat edges and vegetation.

Bat Detector Information:

Peak frequency range (kHz): 109.8 (106.4 - 113.3)
Call frequency range (kHz): 84.6 - 113.3
Bat detector call description: continuous loud bubbling warbling. Calls are very directional and difficult to detect.

Noctule Bat (Nyctalus noctula)

This widespread and fairly common bat is found throughout Britain up to southern Scotland. It is a large species with a wingspan of between 320 - 450mm and roosts in trees, rarely in buildings. Emerging 5 - 10 minutes after sunset and occasionally before, this bat has a fast, straight flight above trees and open habitats, diving steeply when hunting.

Bat Detector Information:

Peak frequency range (kHz): 20.3 (16.8 - 26)
Call frequency range (kHz): 15.2 - 52.8
Call description: slow, irregular, very loud, metallic ‘chinks' or ‘chip-chop' calls over the whole frequency range.

Leisler's Bat (Nyctalus leisleri)

This widespread but rare bat is found throughout Britain to Southern Scotland but is absent from Wales. A medium sized species with a 300 - 340mm wingspan, it roosts in trees and buildings and emerges 10 - 15 minutes after sunset and sometimes before. It has fast, straight flight above trees in open habitats and dives less steeply than the Noctule bat when hunting.

Bat Detector Information:

Peak frequency range (kHz): 26.9 (21.1 - 36.6)
Call frequency range (kHz): 20.6 - 61.0)
Call description: slow, irregular, loud, metallic ‘chinks' or ‘chip-chop' calls with clicks at the top of the frequency range. 

Serotine Bat (Eptesicus serotinus)

This widespread and fairly common bat is found in southern England and South Wales. It has a large 320 - 380mm wingspan and roosts in trees and old buildings. Emerging 20 - 25 minutes after sunset, but occasionally before sunset, it has relatively slow flight, often above roof height. It flies in loops in open areas and much closer to vegetation than Noctule bats.

Bat Detector Information:

Peak frequency range (kHz): 32.3 (25.6 - 42.4)
Call frequency range (kHz): 22.4 - 32.0
Call description: medium slow, quite loud, irregular ‘smacks'. 

Barbastelle Bat (Barbastella barbastellus)

This widespread but rare bat can be found in England and South Wales. A small species with a wingspan of 245 - 290mm, it roosts in trees and buildings and emerges 30 - 60 minutes after sunset. It has fast purposeful flight, in vegetation and along habitat edges.

Bat Detector Information:

Peak frequency range (kHz): 36.8
Call frequency range (kHz): 28.4 - 46.0
Call description: quiet, castanet-like ‘smacks'. 

Common Pipistrelle Bat (Pipistrellus pipistrellus)

This widespread and small species is found throughout Britain. It has a wing span of 200 - 234mm and roosts in both old and new buildings, trees and in bat boxes. The common pipestrelle emerges 20 - 30 minutes after sunset, and sometimes before. Its flight is fast, erratic at head height, often along habitat edges.

Bat Detector Information:

Peak frequency range (kHz): 46.5 (41.7 - 51.8)
Call frequency range (kHz): 40.8 - 83.3
Call description: irregular, loud, ‘wet slaps' developing into clicks at the higher end of the frequency range. 

Soprano Pipistrelle Bat (Pipistrellus pygmaeus)

This widespread and common species of bat is found throughout Britain and is small, having a 192 - 232 mm wingspan. It roosts in trees, old and new buildings and also bat boxes. Emerging 20 - 30 minutes after sunset, and occasionally before, it has a fast, erratic flight at head height, often along habitat edges.

Bat Detector Information:

Peak frequency range (kHz): 55.5 (48.8 - 61.6)
Call frequency range (kHz): 47.3 - 90.04
Call description: irregular, loud, ‘wet slaps' developing into clicks at the higher end of the frequency range. 

Nathusius' Pipistrelle Bat (Pipistrellus nathusii)

This widespread and rare bat is found throughout Britain. With a wingspan of 220 - 250mm, it roosts in trees and old or new buildings, as well as bat boxes.It emerges 20 - 30 minutes after sunset and has a fast, erratic flight at head height, often along habitat edges. It is not as manoeuvrable as the other pipistrelle bats in vegetation.

Bat Detector Information:

Peak frequency range (kHz): 40.7 (36.0 - 44.1)
Call frequency range (kHz): 34.6 - 79.2
Call description: irregular, loud, ‘wet slaps' developing into clicks at the higher end of the frequency range. 

The Brown Long-eared Bat (Plecotus auritus)

This widespread and common, medium sized bat, found throughout Britain. With a 240 - 285mm wingspan, it roosts in trees and old buildings and emerges 45 - 65 minutes after sunset. It has slow, fluttering, agile flight in vegetation with occasional hovering pauses.

Bat Detector Information:

Peak frequency range (kHz): 39.8 (31.7 - 45.0)
Call frequency range (kHz): 28.1 - 92.5
Call description: very quiet ‘ticks'. More commonly seen rather than heard on detectors. 

The Grey Long-eared Bat (Plecotus austriacus)

This rare bat is restricted to central southern England. A medium-sized species with a 255 - 300mm wingspan, it roosts in trees and old buildings and emerges 45 - 65 minutes after sunset. It has slow, fluttering, agile flight in vegetation with occasional hovering pauses.

Bat Detector Information:

Peak frequency range (kHz): 40.0 (32.0 - 45.0)
Call frequency range (kHz): 28.0 - 93.00
Call description: very quiet ‘ticks'. More commonly seen rather than heard on detectors. 

Daubenton's Bat (Myotis daubentonii)

The Daubenton's is a widespread and common bat, found throughout Britain. With a wingspan of 230 - 275mm, this medium sized species roosts under bridges and in trees, buildings and tunnels. It emerges 40 - 50 minutes after sunset and has fast, straight flight most often low over smooth water and sometimes along habitat edges.

Bat Detector Information

Peak frequency range (kHz): 47.8 (39.5 - 56.7)
Call frequency range (kHz): 32.0 - 87.5
Call description: Medium loud, rapid series of regular ‘clicks' resembling rapid machine gun fire. 

Natterer's Bat (Myotis nattereri)

This bat is found throughout Britain. It is a widespread and fairly common medium species of bat which has a 245 - 300mm wingspan and roosts in trees, timber framed barns and stone buildings.It emerges 40 - 60 minutes after sunset and has fast, agile flight at head height in habitat edges and sometimes low over water.

Bat Detector Information:

Peak frequency range (kHz): 49.0 (28.0 - 68.0)
Call frequency range (kHz): 20.0 - 101.00
Call description: quiet to medium loud, rapid series of more irregular ‘clicks'. Softer than Daubenton's bat, resembling a ‘stubble burning' sound. 

The Whiskered Bat (Myotis mystacinus)

A widespread but rare species, this small bat is only found in England and Wales. It has a 190 - 225mm wingspan and roosts in trees and buildings. Emerging 30 minutes after sunset, the whiskered bat has fast and straight flight along habitat edges.

Bat Detector Information:

Peak frequency range (kHz): 50.0 (41.7 - 69.4)
Call frequency range (kHz): 32.7 - 88.9
Call description: medium loud, rapid series of more irregular ‘clicks' resembling rapid machine gun fire. 

The Brandt's Bat (Myotis brandtii)

This widespread and rare bat is found in England and Wales. It has a 210 - 255mm wingspan and roosts in trees and buildings.It emerges 30 minutes after sunset and has fast, agile flight at head height along habitat edges. The Brandt's bat is more associated with woodland than the Whiskered bat.

Bat Detector Information:

Peak frequency range (kHz): 50.0 (42.0 - 69.0)
Call frequency range (kHz): 33.0 - 89.00Call description: medium loud, rapid series of more irregular ‘clicks' resembling rapid machine gun fire. 

The Bechstein's Bat (Myotis bechsteinii)

This is a restricted and very rare bat found in central southern England. It is medium sized, with a 250 - 300mm wingspan and usually roosts in trees, rarely in buildings.It emerges 30 minutes after sunset and flies at different heights in vegetation with a slow, fluttering flight which is very agile, even in confined spaces.

Bat Detector Information:

Peak frequency range (kHz): 51.0 (45.6 - 55.2)
Call frequency range (kHz): 28.4 - 131.00
Call description: quiet, rapid series of more irregular ‘clicks'. Softer than Daubenton's bat, resembling a ‘stubble burning' sound.

Alcathoe Bat (Myotis alcathoe)

The alcothoe bat was only discovered as a UK breeding species in 2010 and no further details are at this time.

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SKU: 71458946023

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Rich D.
Battle Creek, US
★★★★★ 5
Great Value Replacement Kit for Eufy C10
I recently picked up the Eufy C10 robot vacuum and absolutely love it, so I was excited to find this accessory kit. This is a much more economical way to stock up on all the wear-and-tear parts your robot needs. Everything fits perfectly, the quality feels solid, and it includes all the essentials—main brush, side brushes, filters, and disposable dust bags. Having these on hand makes maintenance easy and keeps the vacuum running at peak performance. If you own a Eufy C10, this kit is a no-brainer. Pros • Excellent value compared to buying parts individually • Includes all common replacement items • Fits the Eufy C10 perfectly • Good build quality on brushes, filters, and bags • Easy snap-in replacement with no tools required Cons • None so far Verdict A smart and affordable way to maintain your Eufy C10. Everything you need in one kit, good quality, and great peace of mind. Highly recommended.
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Reviewed in the United States on January 14, 2026
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Waukegan, US
★★★★★ 5
Everything You Need for Your Eufy S1 Pro
Color: Omni S1 Pro Accessories kit(14 Pieces)
This starter kit ensures that your Eufy S1 Pro Consumables are being replaced as directed by the manufacturer. Comes with both roller brushes and filters!
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Reviewed in the United States on June 15, 2025
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Robert
Fort Morgan, US
★★★★★ 5
Complete Kit at a reasonable price. Fits my Omni S1 Pro!
Color: Omni S1 Pro Accessories kit(14 Pieces)
I love my Omni S1 Pro robotic vacuum. Being able to get a complete resupply pack for my vacuum is wonderful. The whole kit at the coupon value is very reasonable. The mop roller and brush fit my Omni S1 Pro robotic vacuum with no issues. The bags slide right into the charger base and are detected like my other bags I use. Very pleased with the kit will order again
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Reviewed in the United States on May 16, 2025
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Leslie L.
Louisville, US
★★★★★ 5
This really sucks!
This vacuum is awesome. It is replacing my old Shark which finally could not connect to the WiFi anymore. This has stronger suction power, even on just the standard power, not even turned to turbo. The little tower on top of it prevents it from going under only a few items in my home. But it is nice that it doesn’t bang into walls to turn around. It comes up to an item, slows down and then turns. I did have to set up two no go zones, which is very easy to do once I figured it out on the app. Because it got stuck up under my headboard one time so I made that a no go zone. Our bed sits very low to the ground with only about 3 inches so you can’t really get under it. I like the bag dump system versus the old vacuum I had which you just pushed the button and all the dust went into the trashcan blowing half of it up in your face at the same time. So this is very nice. I have had this a few weeks now and I did look at a YouTube video on how to navigate the app. It does so much more than my old vacuum did and it really is nice. The noise is not any louder than the other one. This one stays longer to empty on the base because it also has a little cutter that cuts the hair out of the roller. This is great because of dog hair that would continually get trapped on my old vacuum. I think this vacuum is well worth the money which some of the others were so much more expensive. Battery life seems to be about right for the amount of time that it vacuums and then of course it goes to recharge and comes back out to finish the job. The mapping is awesome and is very detailed, and you can even see where the vacuum is on the map and watch it moving if it is rolling at the time. This comes in very helpful if it is stuck somewhere. I definitely recommend this vacuum. We named her Berta for the maid on “Two and a Half Men”.
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Reviewed in the United States on July 3, 2025
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C H
Port Orchard, US
★★★★★ 1
Eufy: Never Again
It is jaw-droppingly astonishing how AWFUL this thing is. I can deal with all the little problems: I have to pick up cords and small objects. It gets caught on random things and shuts down. It needs some creepy data-harvesting app that does nothing you couldn't do with a TV remote. I can live with all of this. Well, I'd like a robovac that doesn't need an app, because WHY do you need an app? It's pointless. But that's the way this world is, so I guess I have to deal with it. But what I can't handle is how BASIC FUNCTIONALITY does not work. It CANNOT KEEP A SCHEDULE! I have a very simple schedule: run every day at 10am. This device is completely and totally incapable of handling such a basic and simple task. Just run once a day, every day. I can worry about everything else. HOW DO YOU MESS UP A CLOCK? It forgets its ONE JOB every single week. I have to go back into the stupid app, re-set the schedule, probably re-set the map because it invented some new horrible map from the bizarro world because it randomly decided my house was actually NOT my house and it needed to re-establish what's up and what's down, and it got all of that wrong, so we have to go through the mapping process again. And that's if I'm lucky. Sometimes it decides to forget the wifi password (WHY DOES IT NEED WIFI????????) so I have to reconnect that too! And THIS IS EVERY WEEK! THIS IS BASIC FUNCTIONALITY! JUST! RUN! THE! PROGRAM! OH! MY! GOD! You had it right the first time! JUST DO THAT!!!!!!!! Alarm clocks have been doing this for 100 years now. Even before electricity, people could set alarms using candles or sand. How does an ELECTRONIC DEVICE with INTERNET ACCESS fail to know it's 10am and time to run? WHAT ARE YOU EVEN DOING? Normally I think people who type in all caps are crazy. But I am SO SO MAD I CANNOT TYPE NORMALLY. IT'S A CLOCK. LITERALLY JUST LOOK AT THE CLOCK. IT'S NOT DIFFICULT. LOOK. AT. THE. CLOCK. STOP. FORGETTING. MY. SCHEDULE. I don't know why I have bought 4 eufy robovacs. The first one was alright. It was one of their "dumb" vacuums that just bumps into walls. It eventually broke and they stopped selling the parts to fix it, so I bought a "new" (identical but more expensive) model which also eventually broke and they REFUSED to sell me the parts to fix it when it broke. So I bought one of these "smart" ones and it did this thing I'm describing here: forgot, EVERY WEEK, that it is just supposed to run once a day. IT'S NOT HARD. JUST RUN THE PROGRAM! So I wrote a 1 star review and they offered me a refund if I shipped it back in the original packaging. I threw that away so obviously that was not an option. So me in all of my abundant intelligence bought another, thinking it would be better. NOPE. THIS ONE DOES THE SAME THING! That's TWO entirely separate models, which are wholly incapable of ACTUALLY DOING THEIR ONE JOB IN THE WORLD. I should mention that the "dumb" models also had a nasty habit of running randomly at 3am and waking me up in a panic. I guess that should have been my first tip-off that this "tech" company cannot understand the single most basic technology of all of human history: time-keeping. So with 4 eufys under my belt I am extremely, EXTREMELY confident in my decision. Eufy: never again. I will not make this mistake again. I will scream it from the rooftops if I have to. I will tell all my friends. I will write it in the reviews. Never EVER buy eufy. Their vacuums cannot even do their ONE JOB. HOW HARD IS IT????
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Reviewed in the United States on February 2, 2026

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