The utility model relates to a communication device, more specifically say and relate to a computer extension communication module for the GPRS of computer communicates and the RF communications extension, and utilizes the USB interface to carry out the computer and connect, supports plug -and -play, and it is provided by the computer just to move the electric energy. The USB interface provides universal serial bus the interface of communication, and USB communication module is used for the conversion of serial signal and parallel signal, and the singlechip is used for the transmission control of signal. Level conversion chip I matches as the level of GPRS module with the singlechip communication, and the GPRS module is used for the receiving and dispatching conversion of GPRS signal. Level conversion chip matches with the level of singlechip communication as radio frequency module, and radio frequency module is used for radiofrequency signal's receiving and dispatching conversion. The USB interface provides the interface that charges, and charging management module is used for the charging control of power. Power management module is used for discharging of control source and changes the back to output level and supply power for USB communication module, singlechip, GPRS module and radio frequency module.