HealthTree hearing aids adopt the most advanced 16-channel digital sound processing technology and noise reduction technology to reduce environmental noise while enhancing human voice. No longer miss every moment with friends and family. If the hearing aid makes a harsh sound, it is caused by the wrong size of the earplug or the wrong way of wearing it. Therefore, we have three sizes of earplugs to meet the needs of different ear sizes. After the hearing aid is worn tightly, long press the touch button on the hearing aid to turn it on. Press and hold the touch button until 4 beeps, the hearing aid will turn off. The hearing aid has six volume levels and four modes. For specific adjustment methods, please refer to the details page and user manual. It is the best choice for the elderly and people with mild and moderate hearing loss.