Hear Like New Again!FDA (Food and Drug Administration) Approved According to the FDA(Food and Drug Administration), it is the best choice to choose a professional medical evaluation before purchasing a hearing aid. In order to make you can use our products correctly, we will introduce our products in details. Specifications: Maximum saturation sound pressure: 110dB pole Full block sound gain: > 30dB The average gain: > 40dB Frequency Response: 300Hz-4000Hz Standard battery: AG3 button batteries Operating voltage: DC1.5V Operating Current: Product weight: 3gNotes: 1)Adjust volume to the minimum before wearing 2)Choose an earplug of slightly bigger size to avoid whistler 3)Increase volume gradually to avoid sudden increase in sound4) Please regularly clean the ear plugs or ear molds in order to ensure the normal use of hearing aids5) Use for long periods of time, please remove the batteries to prevent battery rotting and eroding hearing aid components6) 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. Package Includes: 1 x Hearing Aid1 x Cleaning Brush3 x Earplug(Different Size)1 x Instruction manual (English)
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