Features： 1. High SIGNAL-NOISE RATIO. 2. One Press button operation, easy for seniors. 3. With Power Display, easy to know when to charge. 4. Five levels volume control with beep sound prompts. 5. TWS earbuds shape, very fashion and not easy to fall out. 6. Mini portable charging case. 3-4 hours to full power of the case, can offer totally 36-90 hours use of hearing aids. 7. FCC, ROHS, CE, EMC Certifications available. .