The device is designed to receive data from 2-wires RS-485 line and transmit them wireless to the RS-485RF/RX receiver. Using it together with PELCO keyboard controller, we can wireless control the motor unit/rotator connected via RS-485 interface to the RS-485RF/RX receiver. The connection is fully transparent, there is no important what kind of data are sent and what transmission system is used. We can send any protocol between control devices. Only baud rate setting is needed.