RESTORE NORMAL HEARING: The hearing aids have 25dB-45dB sound gain and 6-level adjustable sound volume to help people with mild to severe hearing loss restore normal hearing. At the same time, the hearing aid can easily help you and your family/friends communicate with the surrounding environment freely, for example, talk with others, go out, make friends, hear the birdsong and children's laughter at will..ANNOYING WHISTLING REDUCTION: The appearance of our hearing aids is processed with smooth finish to reduce friction with clothing or skin and can decrease 80% possibility of whistling when wearing our hearing aid. Let you get rid of whistling troubles of ordinary hearing aids for seniors on the market..QUICK CHARGE & LONG BATTERY LIFE: Different from the old hearing aids, we adopt rechargeable technology and USB-C charging port, which solves the problem of difficult battery replacement for the elderly, and also completely put an end to the incessant purchase or replacement of hearing aid batteries. Moreover, through Trihear rechargeable hearing amplifiers, you can enjoy as long as 56 hours of hearing enhancement after charging it for just 45 minutes..WARM & THOUGHFUL GIFT: The stylish dark blue frosted shell and built-in digital sound processing chip make Trihear hearing aids for seniors a perfect combination of high technology and aesthetics. It is the best gift for family, friends and loved ones! Get them back to normal life. No longer miss out conversations with friends and family. Immersed in everyone's cheers and laughter..TRUSTED BRAND & SATISFACTORY AFTER-SALES SERVICE: Trihear hearing amplifiers come with a 40-day money-back guarantee and an 18-month warranty. If you have any problems in use, or any questions about the rechargeable hearing aid, please feel free to leave a message to our local service team, and we will give you a satisfactory solution within 24 hours.