USB Rechargeable Sound Amplifier USB Rechargeable Hearing Aid

USB Rechargeable BTE hearing aid, USB Rechargeable hearing aid, USB Rechargeable sound amplifier
KF-809 USB Rechargeable Behind the ear hearing aid
Feature:
CE certificate : 93/42/EEC  ISO 13485;2016
1, Save Money: Don't need often buy the batteries for hearing aid,Batteries Warrant: more 18 months.
2, More Convenient: Use USB interface, Can connect power bank, and computer, Rechargeable anytime and anywhere.
3, Latest IC ciruit Systme: The sound is more clear, The noise is smaller,
4, Sound gain: The crest value is bigger, More than 50dB.
5, Worldwild universal adapters: 100-250V, Include Asia,Europe,Middle East,Africa, Amreica,etc.
Technical Parameter:
1, Max sound output:132±3dB
2, Sound gain:52±5dB
3, Total harmonec wave Distortion:≤2-10%
4, Input noise:≤26dB
5, Current:≤3mA,
6, Voltage: DC 3.7V(Lithium Battery),
7, Batttery Warrant:18 months,
8, USB and Adapters, 100-250V,