If more RXs are needed, you can buy more RX, which allows up to 1 TX and 4 RXs connections.With the increase of RX, the wireless transmission distance will be shortened. (line of sight distance,unobstructed), 1 TX to 1 RX transmission distance: 200m; 1 TX to 2 RX: 60m; 1 TX to 3 RX: 30m; 1 TX to 4 RX: 20m.
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