Hearing Aids Rechargeable Digital Hearing Amplifier for Seniors and Adults, Ergonomics Design Aid Hearing with Perfected

 Features:

1.Max sound out put:129+/- 3dB

2.Sound gain:>= 40dB+/- 5dB 

3.Total harmonic wave distortion:<= 10%

4.Frequency range:450-3400MHz

5.Input Noise:<=32dB

6.Voltage:d.c.1.2V

7.Current:<=2mA

8. Full charging with about 6 hours

9. Working about 48 hours

Accesory:

1x Main Unit

4x Earplugs

1x Brush

1x User Maual 

1x USB Charging cable