Features:

-Adopt bluetooth 4.1 + DSP technology

-Good sound quality

-Many colors available

- Wearing comfortable, good for kids

Specifications:

1. Battery: Lithium 3.7V/350mAh 
2. Working time: 20 hours
3. Standby time: 50 days
4. Charging time: around 3 hours
5. Frequency response: 20 – 20 000 Hz
6. Speaker impedance: 32 ohm
7. Speaker size: 40 mm
8. Microphone sensitivity:-54dB
9. Microphone direction: omni directional
10.Microphone ferquency:50Hz-15KHz
11. Support call automatically noise eliminate function
12. Support call echo cancellation function
13. Bluetooth frequency: 2402MHz~2480MHz
14. Transmit range: 10 meters
15. Bluetooth version: 4.0 +DSP