SKU: 9629463137

Hollyland Mars 300 Pro Single TX, Transmitter w/ 2x HDMI In & Loopout,300Ft Range

Sale price$2421.90 Regular price$2691.00
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Ships within 48 hours · Estimated delivery Jul 31 - Aug 5

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Description

Hollyland Mars 300 Pro Single TX, Transmitter w/ 2x HDMI In & Loopout,300Ft RangeThe Hollyland Mars 300 Pro Single TX is a standalone wireless video transmitter designed for lightweight mirrorless and DSLR camera rigs. It is tailored for solo shooters, indie filmmakers, and live streaming creators who need to beam a high definition video feed wirelessly without losing their on camera monitoring layout. Dual HDMI Interface & Built In Loopout The standout physical feature of the Mars 300 Pro TX is its side mounted dual port array.

The Hollyland Mars 300 Pro Single TX is a standalone wireless video transmitter designed for lightweight mirrorless and DSLR camera rigs.

It is tailored for solo shooters, indie filmmakers, and live-streaming creators who need to beam a high-definition video feed wirelessly without losing their on-camera monitoring layout.

 

Dual HDMI Interface & Built-In Loopout

The standout physical feature of the Mars 300 Pro TX is its side-mounted dual-port array. It does not actually ingest two separate camera feeds simultaneously; instead, it serves as a signal splitter:

  • HDMI Input: Receives the live uncompressed feed from your camera body.

  • HDMI Loopout: Passes that exact input signal right back out via wire. This lets you connect a local on-camera monitor or electronic viewfinder (EVF) directly to the transmitter, eliminating the need for separate HDMI splitters or specialized cages.

Core Hardware & Signal Strengths

  • 300ft Wireless Footprint: Transmits rock-solid video and audio data up to a 300-foot (90-meter) Line-of-Sight (LOS) operational radius.

  • Low Transmission Latency: Achieves a highly responsive latency of roughly 0.1 seconds (100ms). While not ideal for fast-paced focus pulling on cinema lenses, it is perfectly suited for framing, remote directing, client monitoring, and vlogging.

  • Flexible Monitoring Ecosystem: You can monitor the transmission through a physical Mars 300 Pro Receiver or bypass a dedicated hardware box entirely. Using the HollyView App (iOS/Android), the Single TX can broadcast to up to 3 mobile devices (tablets or smartphones) simultaneously.

  • Integrated Screen & Thumbwheel Menu: Features a crisp, side-mounted OLED telemetry display that shows battery levels, frequency channels, and video formats. A multi-functional clickable thumbwheel makes navigating settings quick and easy.

Technical Specifications Matrix

Feature Specification
System Role Profile Standalone Transmitter (TX) Only
Max Input Resolution 1080p at 50/60 fps
Wireless Frequency Carrier 5 GHz Band (With intelligent channel scanning)
Antenna Architecture Internalized Antennas (Sleek, low-profile design to avoid snags)
Mounting Hardware Integrated 1/4"-20 female thread mounting point
Chassis Weight Super lightweight at roughly 136g (4.8 oz)

Power Infrastructure

The Mars 300 Pro Transmitter features a versatile dual-powering configuration to handle fluctuating location environments:

  1. Sony NP-F Battery Plate: Accepts standard Sony L-Series cells (NP-F550/750/970) directly onto the back of the shell for untethered mobile use.

  2. 5V/2A USB-C Input: Operates seamlessly via any common mobile phone charger, USB-PD block, or common power bank, making it an incredibly flexible tool for run-and-gun mirrorless rigs.

 

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 9629463137

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4.2 ★★★★★
Based on 30 reviews
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Treats86
Natrona Heights, US
★★★★★ 5
Amazing. A bit of a job to set it up but worth it!
Color: Black, Color: Black
Excellent quality. Sturdy and strong. The screws that come with it are awful. Get yourself some different ones. Takes a while to set it up and get it all measured. I did it while I was setting up my new Flexi-spot E7 Plus standing desk. Wanted to get it all done at the same time. At first. I thought it might be overkill, but I am sooooo glad I did get this. Now my computer moves along with the desk. It looks great. I bet it has improved the air flow around my computer as well. Looks sleek and cool. I might have set it a bit too tight around my case and as a result I have to shimmy it to get it out of the holder if I have to do any work on the computers internals. But at least I know it's secure. My suggestion would be to leave a little bit of slack to avoid this in your setup. Maybe like a 1/4 inch would be ok. The pads should hold it in place anyway. May loosen mine up if I find the time. But it feels totally secure on the desk with no wobble or shaking. Great product. Also I'm a woman in my late fifties 😃and I was able to set it all up on my own. So don't be intimidated ladies, you can do it too. I also bought two of the ultimate set up cable management trays. Great products. Note for anyone from the Ultimate Setup company who might read this. Please provide better quality wood screws and some extra ones) I stripped three of the cheap ones that came with this. And it took forever to drill them in because they weren't strong enough. Then it would be perfect.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 17, 2025
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Norman D Warren
Cuba, US
★★★★★ 5
Solid, simple and perfect.
Color: Black, Color: Black
Great simple design. The quality is evident in the thickness of materials. The assembly instructions, hardware and tools provided help minimize the time spent from opening the box to install. This product is packaged well and shipped with the customer convenience in mind. Well done!
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Reviewed in the United States on May 26, 2026
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Verified Purchase
Ashton Raum
Charlottesville, US
★★★★★ 5
Awesome quality
Color: White, Color: White
Take your time installing! It comes with all the instructions and templates. Make sure you’re screwing this into solid wood. I would not recommend you hang your expensive PC from a particle board table. My Pc fits in well and it’s compatible with a ton of different sizes. Mine has been mounted under my desk for about 6 months and is rock solid. I will say, mine is balancing in there. If I don’t have it at its center of gravity, it could tip out. You can adjust it with the various screw holes but make sure you mount it into something solid.
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Reviewed in the United States on April 16, 2026
C
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Cameron
Phoenix, US
★★★★★ 5
Fantasic under-desk mounting solution for gaming PC
Color: White
This item comes with an incredible amount of tools and guides for making you successful in mounting your desktop PC under the desk. I am very impressed with the quality of the materials and also the quality of documents included. It feel very sturdy using the included hardware. I would recommend this item for anyone wanting to free up desktop space!
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Reviewed in the United States on March 27, 2026
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Verified Purchase
Mike
Los Angeles, US
★★★★★ 5
PC holder that looks great and works on large PCs for easy under desk mounting
Color: Black
After a lot of research and trial and error I finally found the Heavy Duty Under Desk PC Holder. It is the only under desk PC holder that looks good and is able to hold my HP Omen 45L where I want it - under my desk. Putting it together is relatively easy as was the installation to the desk. No messing with cables or round steel tubes to get the job done. The metal is solid, the black powder coating looks great, and the installation hardware is a;l there including a drill bit, hex key, and wrench. You just need to bring a screw driver for the wood screws to attach it to your desk. Read the instructions and make sure you take the depth of your PC into account when attaching the PC holder to your desk, especially if you have a standing desk with motors.
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Reviewed in the United States on October 16, 2025

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