Mobile communication peripheral device

A mobile communication peripheral device comprising:

• a main body, wherein an identification card is disposed on a surface of said main body;
• a circuit board disposed within said main body, and comprising a transceiver for receiving and emitting a wireless communication signal and a signal processing device electrically connected to said transceiver for processing said wireless communication signal, wherein said wireless communication signal includes a first audio signal;
• an earphone coupled to said main body via a connecting wire for receiving and sending out said first audio signal;
• a microphone coupled to said main body via said connecting wire for receiving a second audio signal;
• a supporting member having a recess structure for positioning said earphone therein, said microphone is disposed within said supporting member, said supporting member further comprises an audio transmission control key;
• a power switch for controlling the power on and off states of said mobile communication peripheral device;
• a power supply circuit for providing electricity required for said mobile communication peripheral device, wherein said power supply circuit comprises a rechargeable battery, a charging circuit, a DC-to-DC voltage regulator and a charging socket;
• and
• an indicator for indicating the operating states of said mobile communication peripheral device, wherein said states comprise a power-on state, a wireless signal searching state, a wireless communication on-line state, a communication termination state, a power-off state and a power deficient state.