Wireless Microphone System: Built-in high-sensitivity condenser microphone, the transmission distance is upgraded to 160 feet (50m) and the signal is stable, No delay, no radiation, anti-howling, anti-interference, constant frequency, clearer sound qualityCharging and working of wireless microphone: The transmitter and receiver have built-in 120mAh rechargeable lithium-ion battery, charging for 2 hours, can provide about 6-8 hours of working time.The USB cable has Micro-USB V2.0, which can charge the transmitter and receiver, and it only takes 2 hours to fully charge.Perfect Application: The plug on the receiver is 3.5mm. For 6.35mm jack, please use additional 6.35mm adapters (included) to connect more devices.Humanized and thoughtful design: If the microphone is not used within 45 minutes without operation, the microphone will automatically shut down, saving power and worry.Built-in cardioid directional condenser microphone, widely used in conferences, speeches, web podcasts, outdoor live broadcasts, yoga instructors, loudspeakers, dance instructors, promotions, games, etc.Specification: type: B-1-to-1 microphoneAudio signal: digital sampling 16bit - 16KHZFrequency response: 100HZ-15KHZTransmission distance: 50MTransmission power consumption: Less than15MAReceive power consumption: Less than10MABattery Type: Li-ion batteryCharging time: 2 hoursMaterial: abscolour: BlackPackage Contents: 1 x 1-to-1 microphone1 x USB cable1 x 3.5 to 6.35MM adapterOnly Ok