High Technology, so small, it fits right behind your ear. Don’t be fooled by the small size or appearance of this device. It may look simple device designed to hide behind your ear, but is actually a major breakthrough in sound interception and amplification technology. Amplify sounds up to 50 decibels .Auto noise reduction ,Low battery consumption, Weight less than 10 grams ,6 volume levels ,Can adjust to either ear .Work with 1 button cell, battery INCLUDED 3 and ear buds 3 attachments .With plastic box for keeping the hearing aid safe. Method of use : 1.Gently open the battery cover, check positive negative directions and put the corresponding model button batteries , close the battery cover. 2.Put the ear hook on the back of the ear left/right as per your need and put the ear plug into the ear.(note: the machine should be closted at this time, that is "OFF", the volume knob should be in the small voice gear, or within the earphone plug into the machine to produce feedback sound in a fraction of second(i.e. whistlers)may cause discomfort.) 3.Turn "ON" on switch and then adjust the volume knob, clockwise ,according to their own sense of hearing, to select the suitable volume. 4.When using if there is the volume of whistlers, because the silicone ear plug is not tight, cause the voice feedback, please check whether the size of the silica gel earplugs, silica gel earplugs is plugged in properly , please change to choose more consistent with the size of the wearer ear canal so that the silica gel earplugs are tightly sealed ear canal and does not don't leak . 5.When stop using hearing aid, please put the power switch in "OFF" position, so that can save battery. Not suitable to use in places of crowd Serious heart disease. suppurative otitis media, carry in patients with cardiac pacemaker and allergy to this product material, ear skin ulcers is forbidden to use
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