ASiNG WM03 2.4G Wireless Microphone Bluetooth Speaker Kit, WM03 Black, WM03 White

1. Frequency range: 2400MHz-2483MHz
2. Working distance: 15m
3. Battery type: rechargeable lithium battery
4. Battery capacity: 300mAh
5. Battery voltage: 3.5V-4.2V
6. Signal to noise ratio: 90dB
7. Usage time: sustainable use 5-6 hours
8. Charging time: 1-2 hours
9. Small and lightweight, comfortable to wear on your head and the ear hooks are stable.
10. 360 degree wireless transmission, high sensitivity.