The Hollyland Mars 400S Pro II is a streamlined SDI/HDMI wireless video transmission system for crews that need dependable HD links, low latency, and flexible monitoring in a compact package. It sends up to 1080p60 with a boosted 12Mb/s data rate for cleaner images and finer detail rendition, improving focus pulls and client previews on busy sets. With a claimed line-of-sight range up to 450ft and latency down to about 70ms in typical use, it offers a stable link for handheld, gimbal, and small studio builds where response matters.
Connectivity is practical and production-ready. The transmitter provides SDI and HDMI inputs and the receiver offers SDI and HDMI outputs, making it easy to bridge cinema cameras, mirrorless bodies, director’s monitors, and switchers without converters. The system supports multiple viewing configurations, including 1 TX x 2 RX, 1 TX x 1 RX + 2 App, or 1 TX x 4 App via the HollyView app, enabling crew-wide visibility for focus, lighting, and client review without extra hardware. For mixed kits, Mars 400S Pro II maintains backward compatibility with the previous Mars 400S Pro generation for cross-pairing in the field.
Signal reliability is strengthened by smart channel scan. On startup, the system selects a clean frequency, and teams can visualize interference levels from the receiver or the app to make informed channel choices when environments get crowded. The adjustable fan control with Auto, Low, and Off modes balances thermal stability with noise needs, offering quiet operation for sound-critical interviews and narrative scenes while maintaining cooling headroom for longer takes.
Power and mounting are kept simple. Both TX and RX support DC input, USB-C, and L-series battery power options for flexible rigging on cameras, cages, carts, or director’s monitors. Thoughtful touches like an integrated cold shoe with 1/4-inch thread help speed setup without extra brackets, and the compact chassis keeps weight manageable on gimbals and lightweight rigs. Clear OLED status displays assist with channel, link, and power checks at a glance.
For workflow speed, the higher 12Mb/s data rate enhances detail for focus pulling and better image assessment on set, especially when judging critical sharpness on fast lenses or fine textures. Supported formats include common HD frame rates over both HDMI and SDI, fitting broadcast, live, and cinema pipelines. With direct data stream from RX available for certain live streaming setups, the receiver can feed encoders more directly in lean productions.
Use cases span commercials, narrative, documentary, corporate, live events, and social content. Directors get a clean, responsive feed for framing and performance notes, 1st ACs gain a sharper signal for reliable pulls, and clients see consistent previews without crowding video village. For multi-cam days, the multi-receiver and app options scale visibility across departments without duplicating hardware on every station.
As a camera rental partner, Unicorn Films supplies Mars 400S Pro II in ready-to-shoot wireless kits tailored to the chosen camera package. Each setup is delivered with paired TX/RX units, tuned channels, spare antennas, L-series battery options, DC and USB-C power, SDI/HDMI cabling, cold shoe mounts, and quick-start cards for pairing and app monitoring. Our knowledgeable crew aligns the kit with monitors and switchers, advises on smart channel scan best practices, and sets fan profiles for quiet sets versus outdoor thermal stability. The aim is simple: hassle-free rentals that give crews reliable HD wireless with minimal setup.
For teams that prioritize responsive monitoring, robust I/O, and flexible viewing options in a compact form, the Hollyland Mars 400S Pro II offers a thoughtful balance of range, latency, and usability. It enhances on-set collaboration, keeps images sharp for focus, and reduces friction across departments through app-enabled viewing and smart frequency management.
| Feature | Description | Benefit |
|---|---|---|
| Up to 1080p60 | Transmits Full HD with a 12Mb/s data rate. | Sharper detail and cleaner monitoring for focus. |
| Approx. 70ms Latency | Low-latency link for responsive operation. | Natural timing for operators and clients. |
| Up to 450ft LOS | Rated line-of-sight range in open environments. | Reliable coverage around set and video village. |
| SDI + HDMI I/O | TX inputs and RX outputs for both interfaces. | Bridges cinema cameras, switchers, and monitors. |
| Multi-Device Monitoring | Supports multiple RX and HollyView app devices. | Scales visibility across departments easily. |
| Smart Channel Scan | Auto-selects clean frequencies with visual guidance. | Fewer dropouts in crowded RF conditions. |
| Adjustable Fan Modes | Auto, Low, and Off for cooling vs noise needs. | Quiet operation for dialogue-heavy scenes. |
| Flexible Power | L-series battery, DC input, or USB-C. | Easy rig integration on camera or carts. |
| OLED Status Displays | Channel, link, format, and power at a glance. | Faster checks and fewer setup errors. |
| Integrated Cold Shoe | Cold shoe with 1/4-inch thread built in. | Quick mounting without extra brackets. |
It transmits up to 1080p60 and supports common HD frame rates over SDI and HDMI for broad compatibility with cinema and mirrorless workflows.
Typical setups include 1 TX x 2 RX, 1 TX x 1 RX + 2 app devices, or up to 1 TX x 4 app devices using HollyView.
The system auto-selects a cleaner frequency at startup and provides a visual scan so crews can manually choose channels in crowded RF environments.
Fan modes include Auto, Low, and Off, allowing noise control for dialogue scenes while maintaining thermal stability for longer takes.
Both TX and RX can run from L-series batteries, DC input, or USB-C, making it easy to rig on cameras, monitors, or carts.
