A wireless headset system including a switching unit having a detection circuit coupled to a wireless adapter. The detection circuit provides a first output signal to the wireless adapter upon detection of a triggering event, such as activation of a manual switch or detection of voltage of an audio output signal from a mobile communications device. The first output signal causes the wireless adapter to enter into an active audio channel mode. The detection circuit also provides a second output signal to the wireless adapter when no triggering event is detected, and the second output signal causes the wireless adapter to enter into a standby mode. Placing at least the wireless adapter in a standby mode saves battery life of the system.