Mini Hearing Aids for Seniors with Noise Cancelling, Comfortable Lightweight Hearing Devices Sound Voice Amplifier Light Weight and Invisible - Mini hearing aids with small size 16mm and lightweight 2g, designed for comfortable extended wear. This hearing aid is smaller than a pistachio and is nearly invisible when worn. Comfortable & Stable - Based on extensive human ear contour data, the design ensures a secure, ergonomic fit for enhanced comfort and stability. Noise Reduction - Equipped with an intelligent noise reduction chip that helps deliver clear, natural sound. Easy To Operate - Simple three-step operation: insert the battery, turn the power on/off, and adjust the volume using the rotary control. Durable Battery Hearing Aids - Powered by replaceable A10 zinc-air batteries, providing up to 72–96 hours of continuous use. Specifications: 1. OSPL90: 112dB ± 3dB 2. Output sound pressure level (high-frequency average): 108dB ± 4dB 3. Full range sound gain (maximum): 35dB ± 5dB 4. Full range sound gain (average): 30dB ± 5dB 5. Equivalent input noise level: 29dB ± 3dB 6. Frequency response range: 400Hz–4600Hz 7. Total harmonic distortion: 10% 8. Battery type: A10/PR536 (zinc-air), 95mAh 9. Rated power supply current consumption: 2.5mA Size: 1.6 x 1.6 x 1 cm Package Includes: 1 x Hearing Aid