A wireless device of the present invention has a wireless access device and a wireless stylus. The wireless stylus has a cursor control unit, an identification code storage unit, a mouse interface circuit, and a radio frequency transmitter. The cursor control unit is used to generate a movement signal, and the identification code storage unit is used to store temporarily identification code information. The mouse interface circuit is electrically connected with the cursor control unit and the identification code storage unit. Besides, the mouse interface circuit is used to receive the movement signal and the identification code information to output a cursor control signal and an identification code signal, by signal information processing. The radio frequency transmitter is electrically connected to the mouse interface circuit and used to transmit the cursor control signal and the identification code signal to the wireless access device by wireless communication.