A wireless headset includes a microphone supporting member having a microphone installed therein and being able to be folded to or unfolded from the main body of the wireless headset, and a sensing device connected to a connector of the microphone supporting member. The sensing device senses whether the microphone supporting member is folded or unfolded. If the microphone supporting member is unfolded, an attempt to register an ID (identification) of the wireless headset in a counterpart terminal and to connect a Bluetooth.TM. wireless communication link between the wireless headset and the counterpart terminal is performed using the Bluetooth.TM. module.