The lavalier microphone is powered by an LR44 battery (included) and is equipped with a switch to turn the battery off or on. When using the microphone with a smartphone toggle the switch off since power is supplied by the smartphone. To operate with a camera, toggle the switch on to use the battery power. A 1/4″ adapter, foam windscreen, and microphone clip are also included. KEY FEATURES Clip-On Mic for Smartphones, DSLR, Camcorders. Condenser Microphone. Low handling noise Cable lenght is up to 6m. Omni-directional pick-up pattern Can be used with cameras, smartphones, recording devices WHAT’S IN THE BOX BY-MI Lavalier microphone. Noise cancelling wind muffs. Clothing clip. 35mm 6.35mm audio connector. Battery. Carry pouch