Earrck hearing aids is easy to adjust sound levels by button. To increase volume, please short press the front button, three beeps indicate maximum level. To decrease volume, short press the back button. Three beeps indicate lowest level.
Recommend you adjust volume to the lowest level before wearing at beginning. Fully charged within 6 hours, then the hearing sound amplifier aids can be used for more than 35 hours.
There will be 350 hours back up power in the charging case for charging 2 hearing aids about 5 times. The chargers come with over charging protection circuit so that you do not need to worry about overcharging.
Note: Don't make your hearing aid battery drain completely is best way to keep your battery case Durable. The Hearing aid Earbuds has 3 modes for your option, help you better adapt to the surrounding environment. Normal Listening Mode: for Most Daily Discourse and Watching TV. Noisy Environment Mode: for Party, in Plane or other Noisy Situations. Tinnitus Masking Mode: For Tinnitus Sufferers or those who want to reduce Sensitivity to constant background Noise.Long Press any button for 3 seconds for Mode Selection (1 beep 1st) (2 beeps 2nd) (3 beeps 3rd). This hearing aids for adults' ear sound amplifier comes with Five different sizes of "soft earplugs".
You can choose the appropriate soft earplugs according to the size of the ear canal. (Please remove the insulating film from the bottom of hearing aid before wearing) This product comes with 1 pair of sound amplifier for ears with Charging Case, 1 ×cleaning brush, 1 ×USB charging cable and 1 × manual, 2 × replacement tube.