Description
- Package included: 1 x Hearing aid，4 x Earplug (different sizes)，2 x A675 button cell ，1 x User manual，1 x Box .
- Adjust volume to the minimum before wearing，Choose an earplug of slightly bigger size to avoid whistler.
- Increase volume gradually to avoid sudden increase in sound.
- If you hear a howling, check the ear (silica gel) is appropriate and whether the size of plug is tight, the appropriate choice of earplugs and plugged, make sure no air leakage.
- Keep the ear plug clean，Remove the battery if you don't use it for long time.
Specifications: Max Sound Output: 129dB ± 4dBMax Sound Gain: 45dB ± 5dBHarmonic Wave Distortion: ≤5%Frequency Range: 450~3500 hzInput Noise: ≤30dBBattery: A675 button cell Working Voltage: dc1.5V Working Current: ≤3mA Color: As the picture showsItem Size: 5.0 x 3.8 x 1.0 c Package Size: 9.0 x 7.5 x 3.2cm
