1. Main unit (1) earplugs (4) battery (2) brush (1) earplug cleaning stick (1)

Plastic gift box (1) English instruction manual

2. Maximum sound output: 110±5dB

3. Sound gain: ≥30dB

4. Total harmonic distortion: ≤10%

5. Frequency range: 300 - 4000 Hz

6. Input noise: ≤40 decibels

7. Working voltage: 1.5V (AG3 button battery)

8. Working current: 4mA