Manufacture:  China , Chinese Factory Homegrown products for  Sale
Type: Hearing Aid 
Maximal Sound Output: ≤ 80dB ± 5dB 
Input of Adapter: 100-300V Alternating Current 50/60HZ 0.15A 
Color: Gold Silver

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 0-30db without 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