Wireless Microphone Headphone System: Built-in high-sensitivity condenser microphone.No delay, no radiation, anti-howling, anti-interference, constant frequency, clearer sound quality.Charging and working of wireless microphone: The transmitter and receiver have built-in 120 mAh rechargeable lithium-ion batteries, which can provide about 6-8 hours of working time.The USB cable is equipped with two Micro USB V2.0 interfaces, which can charge the transmitter and receiver at the same time, and it only takes 2.5 hours to fully charge.Perfect application: The plug on the receiver is 3.5 mm. For 6.35 mm jack, please use the included 6.35 mm adapter to connect more devices.Humanized and considerate design: If the microphone is not used within 45 minutes, the microphone will automatically shut down, saving power and worry.Built-in cardioid directional condenser microphone, widely used in conferences, speeches, online podcasts, outdoor live broadcasts, yoga instructors, megaphones, dance instructors, promotions, games, etc.