1.Max sound out put:125+/- 3dB
2.Sound gain:>= 28dB+/- 5dB
3.Total harmonic wave distortion:<= 3%
4.Frequency range:300-3500MHz
5.Input Noise:<=32dB
6.Voltage:d.c.1.5V
7.Current:<=2mA
8. Full charing about 2 hours
9. Working time more than 30 hours
10. Built-in 25mAH recharing battery for hearing aid unit
11. Charging box without built-in battery,
needs USB charing cable directly

Type:Hearing Aid
Note: To protect your hearing, please don't use this product at a high volume for a long time.
Not suitable for the crowd
1.According to the average frequency of pure tone audiogram language frequency calculation, or in the 0-30dbwithout the use of hearing aids
2.Sudden deafness,especially occurring within three months
3. Tinnitus, unilateral or bilateral
4.Rapidly progressive hearing loss
5.Obscure aural crowds with unexplained hearing
6. Serious binaural otitis externa, otitis media, pus,and double external auditory canal closure
Package Include
2X Hearing Aid
6 X Earplug
1XRecharger
TIPS:
The actual color and shape of the item might looks slightly different from pictures because of the technical improvement and manufacturing variance or Computer screen color difference.