1.This product is a smart wireless microph that provides professional-grade recording output. 2. and play, no APP required. 3. It can be connected ti a varuety of device as camera, digital video and other sound recording device. 4. It can solve the problem pf low recording sound in the process of DV remote recording. 5.The wireless microph consists of two parts, is microph transmitter, the other on is receiver as below picture.