1. bluetooth version: 5.0
2. material: plastic + metal
3. battery capacity: 300mah
4. charging time: 2-3h
5. talking time: 18h
6. music playing time: 18h
7. standby time: 300h
8. speaker impedance: 32 ohms
9. speaker power: 10mw
10. 40mm drive unit, strong bass effect
11. retractable head beam, adapt to various head shapes, comfortable and stable to wear
12. high-recognition button control, simple operation
13. rotation design, self-adaptive adjustment of rotation, can rotate and lay flat, easy to carry
14. high imitation protein lint, soft, skin-friendly and comfortable, making listening to songs more comfortable