Light Weight and Invisible - Mini hearing aids with small size 16mm and lightweight 2g , no burden for ears for long time using. This hearing aids smaller than a pistachio ,completely invisible when you wear it . Comfortable & Stable According to the study of a large number of human ear contour data, the wearing form of hearing aid is redesigned to make the hearing aid fit the auricle and make it more stable , comfortable and lighter to wear . Noise Reduction With a built in intelligent noise reduction chip, this hearing aids provide nature sound ,share beautiful voice with your loved. Easy To Operate Easy to operate for seniors adults ,only three steps ,put into battery first , and then switch to on /off button ,finally rotate the volume button to adjust volume level according to your requirement . Durable Battery Hearing AidsThis pair hearing aids amplifiers comes equipped with replaceable A10 Zinc air battery .it can continue use up to 72-96 hours . 1. OSPL90: 112dB+3dB 2. Output sound pressure level (high-frequency average): 108dB 4dB 3. Full range sound gain (largest gain): 35dB 5dB 4. Full range sound gain (average gain): 30dB 5dB 5. Equivalent input noise level: 29dB+3dB 6. Frequency response range: 400Hz~4600Hz 7. Total harmonic distortion: 10% 8. Environmentally friendly button type battery: A10/PR536 (one zinc air battery) Capacity: 95mAh 9. Rated power supply current consumption: 2.5mA Size: 1.6*1.6*1 cm Package Included: 1 Pc Of hearing aid