A Bluetooth earphone set, which includes a main unit that houses an auto-reversible first winding mechanism and an auto-reversible second winding mechanism, an earphone cable coupled to the auto-reversible first winding mechanism for voice output, a signal connector cable coupled to the auto-reversible second winding mechanism and connectable to a cell phone, a switch, which is switched between a first position for enabling the earphone cable to output voice signal that is received wirelessly from a cell phone by the main unit and a second position for enabling the earphone to output voice signal that is received from a cell phone through the signal connector cable.