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
