Note: 1. Please do not use hearing aids at high volume for a long time, it will damage your hearing._x000D_2. Please take care of this product at any time to prevent foreign matter from blocking the earplugs and microphone port._x000D_3. Please do not use the hearing aid in bathing, swimming, raining or humid environment, please do not expose the hearing aid to the sun, and do not approach the stove or other heat sources._x000D_4. Please protect the hearing aid carefully to avoid dropping it on the floor._x000D_5. Please do not take out the old batteries placed in the hearing aid for a long time to avoid corrosion caused by battery leakage. Please use old batteries in an environmentally friendly manner._x000D_6. Put the hearing aids away from the children. specification: Item Type: In-Ear Hearing Aid_x000D_Material: Plastic_x000D_Power Supply: 1 x LR41 button battery (not include)_x000D_1. Maximum Sound Output: 1105dB_x000D_2. Sound Gain: 30dB_x000D_4. Total Harmonic Distortion: 10%_x000D_5. Frequency Range: 300HZ-4000HZ_x000D_6. Input Noise: 40dB_x000D_7.Voltage: 1.5V_x000D_Instructions: _x000D_1. Open the battery box, put in the corresponding battery, and cover the battery box tightly.(Note: Open the battery box, the product will stop working, completely close the battery box, it will start working.)_x000D_2. Insert the earplug into the hearing aid, put the hearing aid into the ear, move it up and down to make sure its position is correct, adjust the volume to get a clear sound_x000D_3. If you feel the sound of whistling, please confirm whether you plug the earplugs tightly, or whether you use earplugs of appropriate size._x000D_4. When you stop using the hearing aid, please remove the battery or turn off the power of the hearing aid. (Note: Please make sure the hearing aid is in the "off" position or the volume is at the minimum volume of "1", otherwise the instant sound will make you feel uncomfortable) Features: 1The body is compact as if it is not worn, close to your ear canal, the simulate design is more comfortable 2Come with simple operation, no need to debug, just buy and use, easy to understand and convenient to use 3There is no switch design, you can use the battery button close to switch on and off 4A variety of earplugs, different earplug sizes make you more comfortable 5Hearing aid is made of excellent plastic material, durable, waterproof and light PackageList: 1 x Hearing Aid 5 x Earplugs(1 piece on hearing aid) 1 x Storage Box 1 x User Manual 1 x Cleaning Brush 1 x Manual Dustproof Tool