Note: 1. It is forbidden to use for patients with otitis media or ear abscess._x000D_2. Do not place the hearing aid in a high or low temperature environment._x000D_3. Please do not use different types of batteries, please replace with new batteries when the batteries are used up._x000D_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._x000D_5. Please take out the battery when not in use for a long time to prevent battery leakage and corrosion of hearing aids._x000D_6. Do not clean the hearing aid with water or organic detergent. Don't put it in water._x000D_7. Don't throw the hearing aid into the fire._x000D_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 effect of the hearing aid. specification: Item Type: Hearing Aid_x000D__x000D_Material: ABS_x000D_Power Supply: 1Pc LR754H Button Battery (Not Included)_x000D_Maximum Sound Output: 1105dB_x000D_Maximum Sound Gain: 30dB_x000D_Total Harmonic Distortion: 10%_x000D_Frequency Range: 300Hz-4000Hz_x000D_Input Noise: 40db_x000D_Voltage: 1.5V_x000D_Current: 4mA_x000D_Instructions:_x000D__x000D_1. Put the earplugs on the hearing aid, you can choose the appropriate size earplugs for your ears._x000D_2. Open the battery box cover and insert the battery in the correct direction._x000D_3. Put the hearing aid in your ear and plug the earplugs tightly. (Please make sure that the power of the hearing aid is turned off or the volume adjuster is at the minimum position, otherwise the instant sound will make you feel uncomfortable)_x000D_4. Turn on the hearing aid and adjust the volume to make the sound clear. If you hear a whistle, check whether the earplugs are tightly plugged._x000D_5. When you stop using the hearing aid, remove the battery to effectively save energy. Features: 1ITE hearing aid with compact body, close to the ear canal for higher invisibility, no additional burden for you. 2Biomimetic shape design for comfortable wearing, can provides clear sound quality. 31105dB maximum sound output, low distortion, allows you hear natural original sound. 4Simple operation, no switch design, use the battery button to switch on and off, no need to debug, just buy and use, easy to use. 5Equipped with 3 earplugs with different sizes to meet your needs, make sure a perfectly fit. PackageList: 1 x Hearing Aid(Not Included Battery) 3 x Earplugs 1 x English Manual