Features:

1.Max sound output:111±5dB
2.Sound gain: ≥30dB±5dB
3.Total harmonic wave distortion: ≤5%
4.Frequency range: F1≤200Hz, F2≥5000Hz
5.Input Noise: ≤28dB
6.Voltage: d.c.1.5V
7.Current: ≤1.2mA
8. Full charing in 2~3 hours, working more than 30 hours
9. The 300mAh recharging box for 3 times recharging to extend hearing amplifiers with 90 hours working.
10. The recharging box with power capacity LED display

Packaging list:

2 x hosts

1 x charging compartment

6 x earplugs

1 x brush

1 x USB charging cable

1 x English instruction manual