Specifications: Type: Hearing Amplifier Group: Adult, Elder Power Mode: Rechargeable Features: Lightweight, Invisible - Mini hearing aid, small size 16mm, weighing 2g lighter, and will not cause a burden on the ears after long-term use. This hearing aid is smaller than a pistachio and completely invisible when worn. Comfortable and Stable - Based on research on a large amount of human ear contour data, the form of wearing hearing aids has been redesigned to fit the ear, making it more stable, comfortable, and lightweight to wear. Noise Reduction - Built in intelligent noise reduction chip, this hearing aid provides natural sound and shares beautiful sounds with your loved ones. Easy to Operate - Elderly people only need three steps: first insert the battery, then turn on/off the button, and finally rotate the volume button to adjust the volume level according to your requirements. Durable Battery Hearing Aids - This pair of hearing aid amplifiers are equipped with replaceable A10 Zincair battery. It can be used continuously for up to 72-96 hours. Package Included: 1 x Hearing Amplifier (Built-in lithium battery) Note: 1. Please allow 1-3 cm measuring deviation due to manual measurement. ( 1 inch = 2.54 cm ) 2. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!