1. Bluetooth version: V5.1
2. Battery: 130mAh
3. Use time: about 8h
4. Communication distance: about 10m
5. Supported protocols: HEP/HSP/A2D/AVRCP
6. Frequency: 20Hz-20KHz
7. Impedance: 32 ohms
8. Sensitivity: 85dB/mW
9. Waterproof grade: IPX 5
10. Speaker material: copper ring speaker 14.2mm
11. Appearance material: ABS, TPE
12. Size: about 15 x 4 x 0.7cm
13. Weight: about 18 grams

Features:
1. Bone conduction sound transmission, no contact with the ear, no sense of wearing
2. Lightweight design, stable and non-displaceable, long-lasting wearing
3. Large moving coil unit, HIFI stereo surround sound, full and detailed sound
4. 5.1 Bluetooth chip, fast transmission, stable and continuous connection
5. TPE soft rubber material, good toughness, can be bent arbitrarily
6. Sports grade sweatproof, easy to use
7. Support electronic products with Bluetooth connection settings such as computers, mobile phones, smart watches, etc.
8. Key operation, simple and convenient