Product information:
Power supply method: USB
Color: Skin color - Universal left and right
Specifications: USB direct charging, European standard, American standard, British standard
Battery life: more than 12 hours

Features:

 1. MAX OSPL90: ≤129±3dB

2 .Harmonic Wave Distortion: ≤10%

3. Frequency Range:450～5000Hz

4. Sound gain: ≥38±5dB

5. Input Noise: ≤29±3dB

6. Charing box:

Include 300mAH

Full charging about 3 hours

OK to hearing Amplifiers recharging about 4 times

7. Hearing Amplifiers:

Include 35mAH

Full charing about 2 hours

Working more than 25 hours

1 x Main unit
1 x Charging case
3 x Earplugs
1 x Hair brush
1 x USB charging cable
1 x English instruction manual