wireless PTZ controller,wireless transmitter for RS-485 data, replace Rs-485 cables wireless PTZ controller, data wireless transmitter : YS-C20U ... smart terminal: POS, PDA, * Wireless electronic display screen, LED display; * RS-485 wired multi-drop system changeover wireless system; * Wireless remote ... -8375 6095 PTZ wireless controller, wireless PZT, RF transmitter replace RS-485 wires