General technical specifications:
1: bluetooth version: V4.1+EDR.
2: chip model: original WT chip.
3: drive unit: Φ 10 mm
4. Transmission power: Class 2.
5: the speaker impedance: 16 Ω plus or minus 15%
6: sensitivity: 105db.
7: distortion: less than 0.8%.
8. Noise reduction technology: CVC 6.0 noise reduction technology.
9: frequency response: 20-20khz. 10: battery indicator: lithium battery 120 mAh.
11: call time: 8h.
12: broadcasting time: 8h.
13: standby time: above 120h.

Product features:
1. Fashion and refinement, anti-sweat, and also suitable for business and sports.
2. Bluetooth 4.1 version, compatible with 99% of bluetooth devices.
3. Support music playback, WeChat voice, call, etc.
4. Smart one tow, connect two mobile phones at the same time.
5. Call number