Hollyland Mars 300 Pro Single TX, Transmitter w/ 2x HDMI In & Loopout,300Ft Range
Hollyland Mars 300 Pro Single TX, Transmitter w/ 2x HDMI In & Loopout,300Ft Range is backordered and will ship as soon as it is back in stock.
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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:
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HDMI Input: Receives the live uncompressed feed from your camera body.
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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
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300ft Wireless Footprint: Transmits rock-solid video and audio data up to a 300-foot (90-meter) Line-of-Sight (LOS) operational radius.
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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.
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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.
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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:
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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.
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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.




