2. Impedance: 32 OHM 
3. Bluetooth version: Bluetooth v4.1 + EDR 
4. Bluetooth use band: 2.4GHz 
5. Power level: CLASS II 
6. Output power: 30mW 
7. Bluetooth distance: 10 meters barrier 
8. Frequency response: 20-20000Hz 
9. Operating voltage range: 3.0V-4.2V 
10. Mitou sensitivity: -42dB 
11. With A2DP / AVRCP high quality stereo audio transmission and remote control protocol 
12. Powerful noise de-noising circuit (active noise reduction) 
13. switch between Chinese and English (boot does not connect Bluetooth state, press the switch 2 times, hear the tone switch successfully) 
14. Charging time about 1 hour (power indicator charging: red light, full power: red light off (blue light).) 
15. Product Size: Length 25MM. Width 15MM. High 35mm 
16. Product net weight of about 5g 
17. Talk time is about 4-5 hours 

19. Standby time is about 120 hours 
20. The charging time is about 60 minutes 
21. Battery capacity 60MAH 
22. Charging power: DC5V power supply [round hole interface] (computer USB port, mobile phone charger, car charger) 
23. Compatible phone: compatible with Andrews, Apple, Microsoft, Saipan system with 99% of the Bluetooth mobile phone