Real Hearing Aid with bluetooth - It provides hearing test, and automatically configures hearing compensation according to your degree of hearing loss. Get your personalized hearing aids, without going out to visit doctors or audiologists. User Friendly - You can adjust the volume / mode of the hearing aids by mobile phone or by fingers. It will be more convenient if it’s not easy for you to dealing tiny things. Dual directional microphones for better sound recognition, multi-channel sound process for better sound quality. No whistling or feedback. Rechargeable - Fully charged within 2.5 hours, then can be used for 20+ hours. Quick charge for whole day using, no need to replace batteries. Small Size & Durable - It can provide updating hearing experience to fit the change of your hearing loss, great for long term using.