1. Material: ABS, electronic components
2. Function: intelligent auxiliary listening, noise reduction, high-definition sound quality
3. Rated current: 2mA
4. Built-in battery: 30mAh lithium battery
5. Charging time: 2-3 hours
6. Working hours: 28 hours
7. Stable to wear, comfortable and not easy to fall off
8. Built-in rechargeable battery, no need to replace the battery
9. Small size design, does not take up space
10. Earplugs are available in different sizes