1. Product name: K18 Wireless Mini microphone
2. Frequency range: 2.4G
3. Frequency video range: 20-200khz
4. Sensitivity: -26dB
5. Signal-to-noise ratio: 64dBm
6. Transmission distance: 10 meters
7. Battery capacity: 80mAH
8. Input voltage: DC4.8~ 5.4V
9. Charging current: about 65mA
10. Working time: about 20H
11. Charging time: about 80min
