Connection Type: Wireless Features: Bluetooth ★★ Easy to Operate ★★ Easy to operate for elderly adults, only three steps: first, insert the battery; second, switch the on/off button; and finally, rotate the volume button to adjust the volume level according to your needs. ★★ Durable Battery Hearing Amplifier ★★ This pair of hearing amplifier is equipped with replaceable A10 zinc-air batteries. It can continue to be used for 72 to 96 hours. ★★ Lightweight and Invisible ★★ - The mini hearing aid with a small size of 16mm and a light weight of 2g, there is no burden on the ear after using it for a long time. This hearing aid is smaller than a pistachio and completely invisible when you wear it. ★★ Comfortable & Stable ★★ According to the research of many human ear contour data, the wearing form of the hearing aid has been redesigned to fit the auricle, making it more stable, comfortable and light to wear. ★★ Noise Reduction ★★ Built-in intelligent noise reduction chip, this hearing aid provides natural sound and shares beautiful voices with your loved ones.