Usage: (1) Long press the button for 3-4 seconds, accompanied by a "beep beep" (2 beep) sound. the hearing amplifier's blue light on 3 times later. Then, ambient sounds can be heard, and the hearing amplifier starts to work. (2) Press the button from low to high to increase the volume, each time accompanied by a "beep" sound, until the "beep beep beep" (3 beep) sound is at its maximum volume, then press it again to return to the lowest volume; (3) In the state of power on, long press the button for 3-4 seconds, accompanied by a "beep beep" (2 beep) sound, the hearing amplifiers red light on 3 times later, the sound disappeared, then the hearing amplifier shut down.
Charging and Precautions: 1. Put the hearing amplifier into the charging box, and the red indicator lights on, indicating that it is charging. If the charge is complete, the light will go out. 2. There is a power display on the charging box, which is convenient to check the power of the charging box. 3. when charging the hearing amplifier, try not to use the hearing amplifier again, so as not to cause accidental damage. 4. when charging to plug in all, do not only insert half, such a long time damaged the machine. Be light when plugging in and out the charging plug, or it will become loose over time. 5. Please use the charger with the same rated output power for charging