The Movo DOM1 Lavalier Microphone is a lavalier clip-on microphone that plugs into the handle of the DJI Osmo Handheld 4k Camera. The 4 long cable and omnidirectional pickup pattern allows you to capture crisp sharp audio to bring your video to life. Engineered to the exact specifications of the DJI Osmo including matched impedance the DOM1 is a simple and unobtrusive way to add audio to your video. Attaches directly to the DJI Osmo Handheld 4K Camera via the 3.5mm audio jack. Just plug-and-play! No batteries required.