1. Bluetooth version: 5.1
2. Connection distance: about 10 meters
3. Battery capacity: 3.7V 1500mAh
4. Charging time: about 4h
5. Use time: about 150 hours
6. Speaker impedance: 32 ohms
7. Charging port: USB
8. Waterproof rating: IPX5

Features:
1. The earphones are retractable, easy to stretch, and convenient to store
2. The earphone cable is tough and not easy to break
3. Skin-friendly material, memory rebound soft bow
4. Support TF card insertion, wireless headset + card dual mode, you can listen to songs without your mobile phone
5. With camera button, remote camera can be taken
6. 9D stereo surround, fidelity sound quality
7. Neck-hanging design, comfortable to wear and easy to carry