Feature:1. 3pcs of earplugs are available for use, different size to meet your different needs, comfortable to wear.2. Simple operation, no switch design, switch through the battery installation and closing.3. Intelligent noise reduction, clear sound quality, effective elimination of lowfrequency noise, considerate design.4. The volume is adjustable, use the included tools to adjust the volume, and the hearing aid can be removed by pulling the pull cord.5. Light weight and in small size, fit auditory meatus, no burden when wearing, an important tool for elderly care.Specification:Condition: 100% Brand NewItem Type: Hearing AidMaterial: ABSPower Supply Mode: 1 x A10 Button Battery (Not Included)Maximum Sound Output: 1205dBMaximum Sound Gain: 89dBTotal Harmonic Distortion: 5%Frequency Range: 200Hz-4000HzVoltage: 1.5vCurrent: 4.5mAUsage:1. Choose the correct size earplugs to avoid howling, and use the included tools to adjust the volume.2. Adjust the volume to the minimum first to avoid noise when the battery is installed.3. Insert the battery and pay attention to the direction of the positive and negative poles of the battery.4. Adjust the appropriate volume and put on the hearing aid. The hearing aid can be removed by pulling the pull cord.Unsuitable people:Not suitable for hearing loss between 0 and 30dB. Sudden hearing loss, especially within three months.Tinnitus symptoms appearHearing loss is rapid in a short time Hearing asymmetry, the reason is unknownSevere otitis externa, suppurative otitis media, crossed infection of both earsNote:1. Patients suffering from otitis media must not use this product.2. Do not place the hearing aid in a high or low temperature environment.3. Please do not use different types of batteries, please replace with new batteries when the batteries are used up.4. Please don't use the hearing aid for a long time. If the volume is too loud, it is not good for your ears. Please stop using it if you feel unwell.5. Please take out the battery when not in use for a long time to prevent battery leakage and corrosion of hearing aids.6. Do not clean the hearing aid with water or organic detergent. Don't put it in water.7. Don't throw wasted hearing aids into the fire.8. Please maintain the hearing aid regularly to ensure that the hearing aid is clean. If there is an object blocking the sound hole, it will affect the use of the hearing aid..Package List:1 x Hearing Aid3 x Earplugs1 x Cleaning Brush1 x Earwax Cleaning Tool1 x Volume Adjustment Tool1 x Storage Box1 x English Manual