Features:

1. Max sound out put: 130±5dB

2. Sound gain: ≥45dB±5dB

3. Total harmonic wave distortion: ≤5%

4. Frequency range: 450~3500 Hz

5. Input Noise: ≤30 dB

6. Voltage: d.c.1.4V

7. Current: ≤1.5mA

8. Rechargable design

9. Full recharge via:2.5 hours

10. Working about:60 hours

11. Battery Capacity:120mAh

List:

1 x Host

1 x Manual

1 x Dual headphone cable

8 x Earplugs

1 x USB cable

1 x Adapter