Micro Hearing Aid: Miniature and lightweight, the product weighs about 3.92g, and the size is about 1.42*0.56*0.35 inch. The ear capsule is very small, almost disappearing in the ear, comfortable to wear and easy to carry. Charging function: the hearing aid can be charged through the USB data cable, and it can be fully charged in 2-3 hours. After fully charged, the battery can run continuously for about 48 hours, which is environmentally friendly. Save you the hassle of buying button batteries all the time. Adjustable volume: The volume control is divided into four levels, choose the appropriate volume, select the appropriate mode, and enjoy the wonderful sound. Features: This hearing aids have full digital sound quality for low audio distortion and clearer sound. It also has a noise canceling feature to help users hear the clearest sound. It has full digital circuit control.