1. Material: ABS, electronic components
2. Features: low distortion, low noise, simple operation, adjustable volume
3. Frequency response range: 20Hz-20KHz
4. Input: DC 5V, 500MA
5. Built-in battery: 350mAh lithium battery
6. Charging time: about 3 hours
7. Playing time: about 12 hours
9. Standby time: 60 days
10. Using bone conduction technology, no need for ear, comfortable to wear
11. Waterproof and sweatproof, protect the internal components from damage, durable
12. Automatic noise reduction function to enhance listening experience
13. Net weight: 56 grams
14. Note: Please be sure to follow the following wearing methods when using, the wrong wearing method will affect the use effect!