Hollyland SYCOM 421S 4-Transmitter 1800' A/V Transmission System
SKU: 438671262

Hollyland SYCOM 421S 4-Transmitter 1800' A/V Transmission System

Sale price$4157.55 Regular price$4619.50
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Description

Hollyland SYCOM 421S 4-Transmitter 1800' A/V Transmission SystemThe Syscom 421S 4 Transmitter 1800' A V Transmission System with Carry Case from Hollyland 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 421S system also supports Ethernet pass

The Syscom 421S 4-Transmitter 1800' A/V Transmission System with Carry Case from Hollyland 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 421S system also supports Ethernet pass-through, so you can stream directly via RTSP to the Internet.

The receiver features four SDI and four HDMI outputs (one for each transmitter) for connecting to a monitor or switcher. You can control PTZ cameras via IP or RS-422/485 serial connections. The transmitters have a dedicated tally output port that support optional tally lights. Both units also have an OLED display that confirms the resolution, transmission channel, signal strength, and other details such as battery power. Each transmitter has an L-series battery plate, and the receiver has a V-mount battery plate. Both Transmitters and receiver also feature a 2-pin power input for alternate DC power options.

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

Specifications

Inputs / Outputs
Antenna I/O Transmitter/Receiver: 4 x RP-SMA Female
Video I/O Transmitter: 1 x HDMI Input
Transmitter: 1 x BNC Input
Receiver: 4 x HDMI Output
Receiver: 4 x BNC Output
HDCP Support Not Specified by Manufacturer
Embedded Audio SDI
HDMI
Audio I/O None
Power Transmitter/Receiver: 1 x (Unspecified Type) 2-Pin (36 VDC) Input
Other I/O Transmitter: 1 x USB-C Input
Receiver: 1 x USB-A Input
Transmitter/Receiver: 1 x RJ45 (LAN) Input/Output
Transmitter/Receiver: 1 x Proprietary (RS-422/RS-485) Input/Output
Wireless
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
Wi-Fi Yes
Bluetooth None
Format Support
Video Format HDMI
1080p: 60/50/30/25/24
1080i: 60/50
720p: 60/50
576p: 50
480p: 60
SDI
1080p: 60/50/30/25/24
1080i: 60/50
720p: 60/50
576p: 50
480p: 60
Audio Format Not Specified by Manufacturer
Timecode Support Yes
Power
DC Input Power 36 VDC
Battery Type Transmitter: 1 x L-Series
Receiver: 1 x V-Mount
Power Consumption Transmitter: 12 W
Receiver: 32 W
Mounting
Mounting 1 x 1/4"-20 Female
1 x 3/8"-16 Female
Environmental
IP Rating None
Environmental Protection None
General
Material of Construction Metal
Dimensions Transmitter: 5.7 x 3.5 x 1.2" / 144 x 88 x 30 mm
Receiver: 9.5 x 5.8 x 2.4" / 242 x 148 x 62 mm
Weight Transmitter: 15.2 oz / 431.5 g, Including Antenna, Battery Plate
Receiver: 3.6 lb / 1621 g, Including Antenna, Battery Plate
Packaging Info
Package Weight 23.95 lb
Box Dimensions (LxWxH) 21.5 x 18.25 x 9.25"
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: 438671262

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breya fuentes
Port Orchard, US
★★★★★ 5
Pink perfect and easy to mount
Super easy. Just mount the bracket with a small level and the shelf slides on perfect. And has screws to keep shelf from sliding off. Easy to Do and the pink was the perfect color
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
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Rumor
San Leandro, US
★★★★★ 4
Good quality, but a few issues with the hidden mounts and levelness.
Size: 35x7 2Pcs, Color: Black, Size: 35x7 2Pcs, Color: Black
These are quite nice and also sturdy. Only complaint I have is that I bought a couple of these, and on one of them, only one of them, it was difficult to get the hidden mounts to go into the holes. I think it was probably a manufacturing defect thing. Also, on that particular one, it wasnt as level as the other. Not a show stopper, but if you need a perfectly level type of mounting situation, I would be careful here.
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Reviewed in the United States on September 14, 2025
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NatKenneally
Lowell, US
★★★★★ 5
Great value/easy to install.
Size: 24x6 2Pcs, Color: Black, Size: 24x6 2Pcs, Color: Black
Great product and great value. Easy to install and adds a nice touch to a bathroom.
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Reviewed in the United States on March 21, 2026
B
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Betty D
San Leandro, US
★★★★★ 5
Easy hanging
Size: 31x7 2Pcs, Color: Black
Great size and easy to hang. Have purchased many for my home.
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Reviewed in the United States on May 20, 2026
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David S.
Lowell, US
★★★★★ 5
Look great!
Size: 40x7 2Pcs, Color: Black
Love the way these turned out in my office! I connected 3 shelves in a row across the wall to make one long shelf and it looks great!
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Reviewed in the United States on April 16, 2026

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