Brand: Hlfoaih Color: Blue Model Name: A-360 Battery Weight: 2.51 grams Number of Batteries: 1 Lithium Ion battery (included) Ear-hook type, for both left and right ears. It goes around the back of the ear and hooks on, so you don't have to worry about it falling off, and you can use it with ease. Usable in either the right or left ear, allowing you to use it freely according to your hearing situation. Small, lightweight, and comfortable to wear. Designed to be compact and lightweight, it fits snugly around the ear. Rechargeable, long-lasting operation. When fully charged, it can be used continuously for a long time, so you can use it without worry when going out, traveling, or in outdoor scenes. Recommended as a gift for the elderly, for Respect for the Aged Day, Father's Day, and Mother's Day.