Features: Brand new and high quality 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 quality. This transmitter and receiver have built-in 120mAh rechargeable battery, charging for 2 hours, can provide about 6-8 hours of working time. The USB cable has two Micro USB V2.0, which can charge transmitter and receiver at the same time, and it only takes 2 hours to fully charge. If the microphone is not used within 45 minutes without operation, the microphone will automatically shut down, saving power and worry. Widely used in conferences, speeches, web podcasts, outdoor live broadcasts, yoga instructors, loudspeakers, dance instructors, games, etc. Specifications: Material:Plastic Type:1 in 1 3.5mm/1 in 1 6.35mm/1 in 2 6.35mm Signal: digital sampling 16bit-16KHZ Frequency response: 100HZ-15KHZ Transmission distance: 50M Transmission power consumption: <15MA Receive power consumption: <10MA Charging time: 2 hours Continuous working time: 6-8 hours Frequency band: 2400-2483Mhz Modulation method: GFSK Package Includes: 1x Headphone Microphone Transmitter 1x Receiver note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.