KS-19 Bluetooth Headset Sound Conducting Hanging Neck Business Headphones(Black)

1. Bluetooth version: V5.12. Battery: 130mAh3. Use time: about 8h4. Communication distance: about 10m5. Supported protocols: HEP/HSP/A2D/AVRCP6. Frequency: 20Hz-20KHz7. Impedance: 32 ohms8. Sensitivity: 85dB/mW9. Waterproof grade: IPX 510. Speaker material: copper ring speaker 14.2mm11. Appearance material: ABS, TPE12. Size: about 15 x 4 x 0.7cm13. Weight: about 18 gramsFeatures:1. Bone conduction sound transmission, no contact with the ear, no sense of wearing2. Lightweight design, stable and non-displaceable, long-lasting wearing3. Large moving coil unit, HIFI stereo surround sound, full and detailed sound4. 5.1 Bluetooth chip, fast transmission, stable and continuous connection5. TPE soft rubber material, good toughness, can be bent arbitrarily6. Sports grade sweatproof, easy to use7. Support electronic products with Bluetooth connection settings such as computers, mobile phones, smart watches, etc.8. Key operation, simple and convenient