1. Small size, no burden to wear
2. Multi-channel detection of different sounds, restore reality, double noise reduction
3. Promise tuning design, bid farewell to gear design
4. Built-in A10 button battery, one battery can be used for 60 hours
5. Made of silicone, high comfort, no whistling
6. Equipped with earplugs of different sizes to suit all types of ears
7. Frequency response range: 300HZ-4500HZ
8. Saturation sound pressure level (MAX): less than or equal to 115+3
9. Equivalent input noise level: less than or equal to 29DB+3DB
10. Dimensions: 1.5 x 1.8 cm
11. Weight: single 1.2 grams