• Mini Wireless Stereo Bluetooth Earphone black  color
• Specification:
• 1. Drive: 40 mm
• 2. Impedance: 32 OHM
• 3. Bluetooth version: Bluetooth v4.0 EDR
• 4. Power Level: CLASS II
• 5. Output Power: 30mW
• 6. Bluetooth distance: 10 meters barrier
• 7. Frequency response: 20-20000 Hz
• 8. Operating voltage range:

• Mini Wireless Stereo Bluetooth Earphone black  color
• Specification:
• 1. Drive: 40 mm
• 2. Impedance: 32 OHM
• 3. Bluetooth version: Bluetooth v4.0 EDR
• 4. Power Level: CLASS II
• 5. Output Power: 30mW
• 6. Bluetooth distance: 10 meters barrier
• 7. Frequency response: 20-20000 Hz
• 8. Operating voltage range: 3.0V-4.2V
• 9. Microphone sensitivity: -42dB
• 10. with A2DP / AVRCP high-quality stereo audio transmission and remote control protocol
• 11. Powerful noise noise cancellation circuit (Active Noise Reduction)
• 12. Wired and Bluetooth automatically switch to support audio input
• 13. Charging time is about 1 hour (power indicator Charging: blue light lights, fully charged: blue light goes out)
• 14. Dimensions: Diameter length 20MM. Width 15MM. 18mm high
• 15. Weight about 4g
• 16. Talk time About 4 hours
• 17. Music for about 3 hours
• 18. The standby time is about 3-4 days
• 19. Charging Power: DC5V Power Interface [the hole] (computer USB port, mobile phone charger, car charger)
• 20. Compatible: Compatible with Android, Apple, Microsoft, Symbian 99% of with Bluetooth cell phones(IOS cell phone has power display)