U99 Mini wireless microphone Wireless headset microphone

 UHF one-for-one wireless headset

Frequency range: 610-690Mhz

RF power: 10dBM

Frequency response range: 50Hz-15KHz

Microphone type: capacitor

Battery type: 3.7V lithium battery 390mA

Power input: USB5V / 500mA

Working distance: effective distance 30-40 meters