About This Item:
-Specially designed for hearing-impaired people, more suitable for the ear canal. Even when used for a long time, there is no pain.
-Your hearing aids can be charged using the detachable charging case (you will need to charge the charging case first). 
-Maximum gain is 117dB, suitable for moderate to severe hearing loss (see hearing loss table).
-If the earmuffs are not fully inserted into the ear canal, or if the air leaks out of the earmuffs, it will cause an annoying whistling sound. We offer 3 different sizes of ear tips to reduce whistling and noise.
-Super-mini size and light weight for easy carrying.

Specification:
Colour: White
Charging time: 4-6hours
Working time: 20 hours
Material:ABS+silicone
Voltage: D C 3.7V
Model: Z-19
Peak OSPL 90: ≤117dB+3dB
HAF OSPL 90:110dB±4dB
HAF/FOG gain: 29dB±4dB
Frequency range: 300-3500Hz 
Total harmonic distortion@500Hz:≤7%
Total harmonic distortion@800Hz:≤7%
Total harmonic distortion@1600Hz:≤7%
Equivalent input noise level: ≤25dB+3dB
Rated power supply current consumption: ≤2mA

Package Included:
2x Rechargeable hearing aids
1x Charging case
4x Pairs of earplugs
2x Brushes
2x Screwdrivers
1x USB charging cable