1. Bluetooth version: 5.0 2. Bluetooth distance: straight distance is greater than 20 meters, back distance is greater than 15 meters 3. Battery: high-performance polymer lithium battery 50mA 4. Music time: about 5 hours 5. Charging box battery: 500mA 6. Standby time: more than 60 hours 7. Speaker impedance: 32 ohms 8. Ergonomic design, comfortable to wear 9. Mini and compact, easy to carry