【1200 mAh USB rechargeable】The reading light has a built-in 1200mAh battery, which can work wirelessly after fully charged. A USB cable is included in the package. 【3 brightness levels】The clamp desk lamp uses a touch switch, and the light can be turned on and adjusted brightness by touching the switch 【Reading and work companion】The portable and rechargeable clip lamp can accompany you to work, study and read in bed, providing you with soft light and bright vision 【Sturdy clamp and non-slip silicone pad】The bedside lamp can be placed on a desk or table, or hung on the edge of a bed or shelf using its wide-opening clip. The clip holds securely and won't slip on wood. 【360° adjustable】The flexible silicone neck can be adjusted 360° depending on the height and position of your light source