signed to transmit / receive data via radio channel at a speed of up to 9600 bit / s in the frequency range (2410-2465) mhz with the transmitter output power up to 10 mw. If cable routing between devices (which usually are using wired communication channels for data exchange) is impossible, then it is necessary to look for other means of communication, other than wired. Wireless transmission of data between devices is one of possible solutions for this problem. Wcd is a variation of radio extenders for communication lines using for communication interfaces rs-232 and rs-485. For more information please visit our website www.Technotrade.Ua