to the bluetooth cellular phone 22 fig3 or connect to an external usb device such as the computer 23 through the usb interface 17 in additions the bluetooth headset 10 can wirelessly communicate with other bluetooth devices such as an external bluetooth module 24 for computer digital camera 25 mp3 player with a built in bluetooth module 26 pda 27 speaker 28 it household appliance and another bluetooth headset the bluetooth headset 10 in this invention can is better than the conventional headset because it can process both audio signal and digital signal therefore it can be applied widely and be convenient for users please refer to fig5 u02dc fig1 fig5 shows a detailed circuit of the bluetooth module 11 of the bluetooth headset 10 according to the embodiment of the present invention fig6 shows a detailed circuit of the switch module 16 of the bluetooth headset 10 according to the embodiment of the present invention fig7 shows a detailed circuit of the headset 15 of the bluetooth headset 10 according to the embodiment of the present invention fig8 shows a detailed circuit of the audio encoder decoder 12 of the bluetooth headset 10 according to the embodiment of the present invention fig9 shows a detailed circuit of the power module 19 of the bluetooth headset 10 according to the embodiment of the present invention fig1 shows a detailed circuit of the usb interface 17 of the bluetooth headset 10 according to the embodiment of the present invention fig1 shows a detailed circuit of the display module 18 of the bluetooth.