1/2pcs Rechargeable Invisible Hearing Aid In-Ear Hearing Loss Hearing Aids One-Click Operation Sound
Description：1. MAX OSPL90:≤126dB+-/3dB2 .Harmonic Wave Distortion:≤10%3. Frequency Range:450～5000 Hz4. Sound gain:>= 25dB+/- 5dB5. Battery:Rechargeable NI-MH 40mAh 6. Working Voltage DC1.2V 7. Full charging about 5 hours8. Working about 25 30 hours 9. Input Noise: ≤29dB+-/3dB1pcs Packing List:Hearing aid x 1Ear Plug x 4Brush x 1User Manual x 1USB Charging Cable x 1Note:The hearing aids come with different size earplugs,please choose the correct size earplugsto make it wears comfortable and avoid whistler.If noise, it is working, not any defective, just operate as below:Adjust volume to Min----Put into your ear---Stuffed tightly----Adjust volume again----OK