Feature: 1. Premium Material: Hearing amplifiers are made of medical grade silicone, non toxic and tasteless, anti aging, wear resistant, and highly resilient. 2. Superior Sound Quality: Hearing amplifiers using imported chips, excellent sound quality, stable transmission, prevent whistling and reduce noise. 3. Bionic Design: Hearing amplifier aid adopts skin color shape, bionic design. Ergonomic design, fit the contour of the ear, not easy to fall off. 4. Universal to Use: Hearing amplifier aid comes with different sizes of earplugs to fit everyone. The small size and light weight make it stress free to wear. 5. Restoring Hearing: Digital hearing aid helps you to restore your hearing and resume your normal life, watching movies, music and TV shows etc. Specification: Item Type: Hearing Amplifier Material: ABS Maximum Sound Output: ≤ 115±3db Gain of Hfa: ≥ 28db±5db Total Harmonic Distortion: ≤5% Frequency Range: 260-5000Hz Noise: ≤32dB Current: ≤2mA Type of Earphone: Lithium Battery Headphone Battery: 35mAh (included) Battery in Charging Compartment: 300mAh (included). Package List: 2 x Hearing Amplifier4 x Ear Cover1 x Manual1 x Charging Line1 x Charging Bin