Hollyland Syscom

https://www.hollyland-tech.com/syscom-series.html

Syscom 421S Syscom 421S1 receiver x maximum 4 transmitters | 1800ft transmission distance | 0.07s ultra-low latency | 4 pairs of wireless SDI and HDMI outputs on the receiver | Supports RS-422 and RS-485 connections | Supports wireless tally feature |Auto channel scan on receiver
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