1. Material: ABS 2. Weight: about 27.4g 3. Function: hearing aid 4. Power supply mode: USB charging/built-in lithium battery 5. Battery capacity: charging compartment: 300mah, hearing aid 25mah
Features: 1. Comfortable close-to-ear, non-sense design 2. Small and easy to take away 3. Smart chip, active noise reduction 4. Can not get rid of madness, light and free
