1. Product Type: Lavalier Wireless Microphone 2. Channel system: Dual Microphone one Receiver 3. Control method: on 4. Active and passive: Active 5. 2.4G solution: Jerry AD6976M4 6. Working system: GFSK 7. Working frequency: 2.4G-2.4835GHZ 8. Radio sensitivity: -38db Effective distance: Greater than or equal to 10 meters 9. Transmitt er shutdown power consumption: 2ua 10. Transmitt er power consumption (video mode): 25ma 11. Transmitt er power consumption (Bluetooth mode): 30-40ma 12. Receiver power consumption: 16ma 13. Receiver charging current for mobile phone: 1000ma 14. Microphone signal-to-noise ratio: Greater than or equal to 65db 15. Frequency response: 20Hz-20KHz 16. Monitoring: One-way monitoring 17. Microphone: Electret 18. Battery: 300mAh 19. Talk time: More than 10 hours 20. Standby time: (off state): 6 months 21. Charging input standard: DC-5V/MAX 200+/-10mA 22. Charging time: 1.5-2 hours