Specification: Item Type: Wireless FM Transmitter Receiver_x000D_Model: KM208_x000D_Material: ABS_x000D_Function: FM Transmitter_x000D_Receiver Builtin Battery: Dry Battery (not Included) Battery Model: 9V_x000D_Transmitter Built In Battery: Dry Battery(not Included) Battery Model: AA 1.5V Features: 1The wireless FM transmitter receiver microphone system with lapel clip is easy to carry and provides a comfortable way to wear. 2Provide good audio quality, high definition sound quality, pleasant to the ear, very suitable for teachers, lectures, schools, etc. 3Battery switch makes standby better, extend battery life with the included on/off switch when not in use. 4Made of ABS composite plastic material, it has good impact strength and low temperature resilience. Make the receiver durable. 5With wide compatibility, this FM adapter can be used for Meeting, Etiquette, Lecture. PackageList: 1 x FM Transmitter 1 x FM Receiver 1 x Headset 1 x Manual