1. Automatic adsorption, portable and not entangled 2. You can insert a memory card, you can listen to songs without Bluetooth 3.IPX4 life dustproof and waterproof 4. Bluetooth version: 5.0 5. Transmission distance: 10m 6. Talk time: 4-5h 7. Standby time: 100h 8. Charging time: 1.5-2h 9. Battery capacity: 70mAh