Rechargeable Dolphin USB Hearing Aid Behind the Ear Sound Amplifier Elderly Noise Cancelling Deaf Care

1.Max sound output:118±4dB

2.Sound gain: ≥32dB±2dB

3.Total harmonic wave distortion: ≤7%

4.Frequency range:300-3800MHz

5.Input Noise:≤32dB

6.Voltage:d.c.3.7V

7.Current:≤2mA

8. Full charging about 3 hours

9. Normal working about 45 hours

List:

1 x Host

1 x USB cable

5 x Earplugs

1 x Brush

1 x English manual

1 x Shockproof box

Features: