2-in-1 Multi-functional Lavalier 2.4G Wireless Microphone System for Type C Smartphone Back Clip design quicker to clip & use Transmitter with Noise Reduction Function. Reverberation effect, it is convenient to adjust the recording effect in a timely manner. Compatible with all kinds of Mobile Devices, Tablets & other devices. Control Distance: Obstacle Distance -20 meters, Barrier Free Distance 40 meters. Widely used in Live Interviews, Film & Television, Meetings, Video Teaching, Vlog etc Continuity time : About 6 Hours - with Charging Case 24 Hours