The Hollyland Syscom 421 540m/1800' Wireless Video & Audio Transmission System is a multi-cam wireless video transmission system that communicates with up to four cameras using a single receiver with PTZ control as well as tally. Supporting up to 1080p60 video signals via SDI and HDMI, the transmitter/receiver system offers an 1800' line-of-sight transmission range with 0.07 second latency.

The receiver features 4 x SDI/HDMI outputs (one for each transmitter) for connecting to a monitor or switcher. You can also connect the receiver to a LAN, allowing you to pass control signals from a control panel to the transmitters. This enables you to control PTZ cameras as well as send tally information. The transmitters have a dedicated tally output port. Both units also have an OLED display that confirms the resolution, transmission channel, signal strength, and other details such as battery power. The transmitters each have a built-in L-series battery plate, and the receiver has a V-mount battery plate. Both Transmitter and receiver feature a 2-pin power input for extended run times.



  • Up to 1080p60 transmitter/receiver system
  • 1800' line-of-sight transmission
  • SDI and HDMI input
  • SDI and HDMI output
  • Passes control and tally
  • OLED display



Wireless Signal:

Wireless Range 1800' / 548.64 m (Line-of-Sight)
Channel Bandwidth 40 MHz
Frequency Range US: 5.1 to 5.9 GHz
Latency < 0.07 sec
RF Power ≤ 22 dBm
RF Sensitivity -90 dBm


Transmitter Antenna Ports 4 x RP-SMA Male
Receiver Antenna Ports 4 x RP-SMA Male
Transmitter Video Connectors 1 x BNC (3G-SDI / HD-SDI) Input
1 x HDMI Input
Receiver Video Connectors 4 x BNC (3G-SDI) Output
4 x HDMI Output
Transmitter Other I/O 1 x USB Type-C
1 x RJ45 10/100/1000 Ethernet, RS-422, RS-485
1 x 3.5 mm Tally Output
Receiver Other I/O 1 x USB Type-C
1 x RJ45 10/100/1000 Ethernet, RS-422, RS-485
HDCP Support None
Embedded Audio SDI

Format Support:

Broadcast System Compatibility NTSC, PAL
Video Format SDI/BNC:
1080p at 23.98, 24, 25, 30, 50, 60 fps
1080i at 50, 60 fps
720p at 50, 60 fps
1080p at 24, 25, 30, 50, 60 fps
1080i at 50, 60 fps
720p at 50, 60 fps
576p at 50 fps
480p at 60 fps


Transmitter Panel Type OLED
Receiver Panel Type OLED


Transmitter Built-In Battery None
Receiver Built-In Battery None
Transmitter Battery Support 1 x Sony L-Series / NP-F Type
Receiver Battery Support 1 x V-Mount
Transmitter Power Connector 1 x 2-Pin LEMO (7 to 36 VDC) Input
Receiver Power Connector 1 x 2-Pin LEMO (18 to 36 VDC) Input
Transmitter Power Consumption Device: (12 W)
Receiver Power Consumption Device: (32 W)


Transmitter Mounting 1 x 1/4"-20 Female
Receiver Mounting 1 x 1/4"-20 Female
Memory Card Slot Not Specified by Manufacturer
Transmitter Dimensions 5.67 x 3.46 x 1.18" / 144 x 88 x 30 mm (Excluding Antenna and Battery Plate)
Receiver Dimensions 9.53 x 5.83 x 2.44" / 242 x 148 x 62 mm (Excluding Antenna and Battery Plate)
Transmitter Weight 0.9 lb / 431.5 g (Excluding Antenna)
Receiver Weight 3.6 lb / 1621 g (Excluding Antenna)


Content List: 

Hollyland Syscom 421 1800' Wireless Video & Audio Transmission System

2 x Syscom421 Transmitter

1 x Syscom 421 Receiver

15 x 5 GHz Antenna

2 x 7" Magic Arm

1 x OTG Cable

2 x DC Conversion Cable

3 x RS485/RS422 Interface Cable

1 x Power Adapter

SKU Syscom421_2-channels
Barcode # 191460000348
Brand Hollyland
Shipping Weight 13.0000kg
Shipping Width 0.700m
Shipping Height 0.300m
Shipping Length 0.500m

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