ntelligent and high-quality: clear sound quality, beautiful appearance, sturdine and durability, multi-directional noise reduction. With adjustable amplification mode and active noise reduction function, it can reduce unneceary background noise while amplifying the voice, thereby bringing a clear listening experience without causing transmiion lo. Listen to the world of love Lightweight and comfortable: hearing aids are small in size, easy to wear and comfortable. The volume can be adjusted through the buttons, low and medium power, suitable for patients with mild to moderate hearing lo. It is the ideal hearing companion for the hearing impaired who listen to music, talk or watch. The naked design can seamlely blend with your skin, hiding the skin to the greatest extent, and the operation is simple: After confirming that it is in place, adjust the volume position to a comfortable volume. 1. Acceories: host (1) USB cable (1) USB charging head, European standard round plug, American standard flat plug (1) charging base (1) brush (1) earplugs (6) English manual (1) blister (1) Color box (1) 2. Output power: 3.6mW 3. Maximum sound output: 125±4 decibel 4. Sound gain: 30±5 decibel 5. Frequency range: 200--4000 Hz 6. Equivalent input noise: 32dB 7. Harmonic distortion: 10% 8. Continuous working time: 15 hour 9. Battery capacity: 40 mA battery is a rechargeable battery 10. Working current: 3 mA 11. Working voltage: 1.2V 12. Speaker impedance: 120 ohm