Notice: The microphone is very sensitive, do not drop, knock, or strong shock. If the microphone is placed next to the speaker, it may produce whistlers if happened, is about to place the microphone is far from the speaker, or reduce the volume of the speaker. The tape change pick up mode switch settings, can produce noise. The battery indicator on the microphone when opening the lights up and immediately went out to save battery power and prevent stray light effects video. So please check the switch to confirm that the switch has been closed and the microphone is used when you do not use or stop using it. Power supply: 1xAA battery(without battery) Material:plastic colour:Black Package Contents: 1 x Microphone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.