KR16 2 in 1 Wireless Lavalier Microphone 8 Pin Receiver with Charging Box

1. Microphone type: Digital silicon microphone 2. Antenna type: Ceramic antenna 3. Sampling rate: 32KHz 4. Transmission frequency: 2.4GHz 5. Frequency response range: 20Hz-20KHz 6. Transmission time: 20ms 7. Battery capacity: 70mAh (button battery) 8. Charging time: about 80 minutes 9. Working hours: 8 hours 10. Transmission distance: 50 meters (barrier free) 11. Charging box battery capacity: 600mAh