ERGONOMIC DESIGN: about 0.8*0.6*0.9 inches. Stylish designed, looks like earbuds. Different shape earplugs are provided, which can fit all people and very comfortable.
A KEY SWITCH: Adjustable volume and turn on/off, easy operation. Short press for Volume, long press for turn on/off, no need to take it off.
RECHARGEABLE: 10 Hours working for sound amplifier. 3 to 4 times charging with portable case. Charge anytime and anywhere. No need to replace those small, expensive batteries.
CLEAR SOUND: It can restore sound effectively, helps users to hear missed sound with maximum clarity. Designed for mild to moderate.
Wear Ways: The MIC is above, the volume control button is below.
Max OSPL 90: < 120 dB + 3 db
High bottle mean OSPL 90:103dBt4dB
Average gain:23 dbt5db
Equivalent input noise level:<35dB
Total harmonic distortion:< 10%
Frequency response range: 300 hz ~ 3500 Hz
Rated power supply current consumption:<6mA
Charging time: 90 min-2hours
Part 3: Specification
Charging current:< 50 ma
Charging voltage:4.2 v
Charging times(double):5- 6 times
Battery compartment *1
Left ear hearing aid *1
Right ear hearing aid *1
Earplug XL *2
Earplug L * 2
Earplugs M * 2
Earplugs S * 2
Cleaning brush *1
USB charging cable *1