Hollyland Syscom 421S 2to1 Multi-Cam Transmitter and Control System

Hollyland Syscom 421S – 2-to-1 Multi-Cam Wireless Transmission with PTZ Control and Tally

What this system does

The Hollyland Syscom 421S is a multi-cam wireless video and audio transmission system that links up to two cameras to a single receiver. It supports PTZ control and tally information, allowing you to manage camera status and remote camera movement from the receiver side. The system transmits full HD video and audio signals wirelessly between transmitters and the receiver, simplifying multi-camera workflows.

Multi-camera operation, range and latency

The system communicates with up to two transmitters using a single receiver, so you can run a two-camera setup without adding a second receiver. It supports up to 1080p60 video via both SDI and HDMI connections. For live and location work, the Syscom 421S offers a line-of-sight transmission range of 548 meters (1800 feet) and operates with approximately 0.07 second latency. These numbers describe the maximum distance and the low-latency performance you can expect under line-of-sight conditions.

Receiver outputs and network control

The receiver provides two output ports: 2 x SDI/HDMI outputs, with one output assigned to each transmitter. This lets you connect a monitor or a switcher directly to each camera feed. In addition, you can connect the receiver to a LAN. When on the network, the receiver can pass control signals from a control panel to the transmitters. As a result, you can perform PTZ control remotely and send tally information from the control surface to the camera units.

Transmitter and receiver features

Both the transmitters and the receiver include practical power and status features. Each transmitter has a built-in L-series battery plate for direct battery mounting, while the receiver uses a V-mount battery plate. In addition, both transmitter and receiver provide a 2-pin power input to allow for extended run times with external power solutions. Each unit also incorporates an OLED display that shows key status information such as resolution, transmission channel, signal strength, and battery power. The transmitters include a dedicated tally output port for tally light connection.

Typical use cases

Use the Syscom 421S in multi-camera productions where you need a compact wireless link and central control. It suits scenarios that require two camera feeds to be received simultaneously, remote PTZ control, and tally signaling for live switching or studio workflows. The SDI and HDMI I/O options make it suitable for both broadcast and cinema-style setups that rely on these common interfaces.

Key Features

• Up to 1080p60 transmitter/receiver system
• 548m line-of-sight transmission
• SDI and HDMI input
• SDI and HDMI output
• Passes control and tally
• OLED display

Included in the Box

• Hollyland Syscom 421 Wireless Video & Audio Transmission System
• 2 x Transmitter
• Receiver
• 25 x 5 GHz Antenna
• 4 x 7" Magic Arm
• OTG Cable
• 2 x DC Conversion Cable
• 3 x RS485/RS422 Interface Cable
• Power Adapter
• Limited 1-Year Warranty

Specifications

FAQ

Question: Can a single receiver manage two cameras?
Answer: Yes. The Syscom 421S communicates with up to two transmitters using a single receiver and provides two outputs (one per transmitter) so each camera feed can be monitored or routed independently.

Question: What video formats and frame rates does it support?
Answer: The system supports up to 1080p60 video signals via SDI and HDMI, allowing full HD at up to 60 frames per second over either interface.

Question: How far can I reliably transmit and what is the latency?
Answer: Under line-of-sight conditions the system reaches up to 548 meters (1800 feet) and operates with approximately 0.07 second latency, giving you long-range coverage with low delay.

Question: Does it support remote camera control and tally lights?
Answer: Yes. The receiver can connect to a LAN and pass control signals to the transmitters for PTZ control. The transmitters also include a dedicated tally output port for tally light connection.

Question: What power options are available for extended runs?
Answer: Each transmitter includes a built-in L-series battery plate, the receiver includes a V-mount battery plate, and both units feature a 2-pin power input for external power or extended runtime solutions.