embodiment of the external control device 300 and the wireless microphone 100 shown in fig1 please refer to fig3 and 4 at the same time the external control device 300 comprises two push buttons 310 two light emitting elements 320 an earphone 330 an earphone volume control 340 and a microphone 350 the external control device 300 may be electrically connected to the wireless microphone 100 wirelessly or via a cable by pushing one of the two push buttons 310 on the external control device 300 a user may correspondingly control the whole or part of the operating functions of the wireless microphone 100 the two light emitting elements 320 may indicate states of the operating functions of the wireless microphone 100 when a policeman wears the wireless microphone 100 on the waist or puts the wireless microphone 100 in a pocket from where the wireless microphone 100 is less easily operated particularly when the wireless microphone 100 is covered by a heavy winter coat or a bulletproof vest the policeman may directly operate the two push buttons 310 on the external control device 300 to quickly perform various operating functions of the wireless microphone 100 further the policeman may verify the current state of the operating function of the wireless microphone 100 from the lighting condition of the two light emitting elements 320 on the external control device 300 for example the policeman may observe whether the two light emitting elements 320 are flashing or not or observe.