Tips for buyers: The cause of howling/noise: In order to make a mini size hearing aid, the internal amplifier and the microphone are close to each other. The sound is continuously received and expanded, so it has a certain possibility of produce howling after power-on. At present, small hearing aids and high-power hearing aids on the market can hardly avoid howling, and only full-digital hearing aids can avoid howling. Ways to avoid howling/noise: 1. When the power is high (the amplified sound is large), howling is more likely to occur. Therefore, gradually increasing the volume from low can effectively avoid howling. 2. When the ear canal is completely sealed, there is no howling sound. Therefore, please use hearing aids after cleaning your ear canal, and test the earplugs from large to small to find the most suitable earplugs. 3. After the hearing aid enters the ear canal, it is recommended to push the hearing aid with your fingers and hold it for 1-2 seconds, and then release it to fully extend the earplug. In addition: If you do not know how to use it or there is a problem with your hearing aid, please do not rush to leave a negative review and contact us. Thank you. Features High quality invisible hearing aid sound amplifier Super mini size and light weight, not easily to be seen Adjust volume to the minimum before wearing Increase volume gradually to avoid sudden increase in sound Convenient for watching movie, enjoying the drama, attending meeting, or having class, it could help you hear the sound clearly and loudly Specification Mini ITE Hearing aid Max Sound Output: ≥110 dB ± 5dB Max Sound Gain: ≥30 dB ± 5dB Frequency Range: 300～4000Hz Input Noise: ≤40 dB Battery: A10 Button battery included 2 pieces) Working Voltage: dc1.5V Working Current: ≤3mA Steps 1. Choose a suitable earplug to make the product sealed in the ear canal 2. Low down the sound volume 3. When you put into battery , please be quick , to put the product into the ear Note Adjust volume to the minimum before wearing. Choose an earplug of slightly bigger size to avoid whistler. Increase volume gradually to avoid sudden increase in sound. Keep the ear plug clean Remove the battery if you don't use it for long time. Package included 1 x Hearing aid 3 x Earplug (Different sizes) 1 x User manual 1 x Box 1 x Tool

Product specifications