Features:

1.Max sound output:129±3dB

2.Sound gain: ≥40±5dB

3.Total harmonic wave distortion: ≤10%

4.Frequency range:450-3400MHz

5.Input Noise: ≤32dB

6.Voltage: d.c.1.2V

7.Current: ≤1.2mA

8. Full charging about 5H

9. Working more than 30H

List:

1 x Main Unit

4 x Earplugs

1 x Brush

1 x User Manual

1 x USB Charging cable

1 x Adapter