1. Material: ABS
2. Rechargeable case battery: 300mAh
3. Hearing aid battery: 35mAh
4. USB charging, easy to use
5. Lightweight and compact, comfortable to wear
6. One button operation, easy to control
7. External charging compartment, can be carried around
8. Long battery life, small size and large capacity
9. Clear sound quality, just adjust the volume level to get the ideal listening experience
10. Weight: about 80g