Kootek Clip On Book Lights Music Light Stand 10 LED Orchestra Lamp Adjustable Neck Reading Light Rechargeable USB Desk Lamp 10 bright LEDs, built-in Rechargeable Lithium Battery. AC adapter and USB cord included. One Button Control: easy access power switch behind to power on/off and control two brightness levels. Widely Used: suitable for music stands, pianos, orchestra pits, desks, tables, dark clubs, etc. 2-IN-1: it can stand on desk with the base as normal desk lamp and also available to clip almost anywhere and any angle with its anti-skid clip. Portable and Lightweight: take it with you while traveling, it is easy to carry and can be powered by built-in battery. (NOTE: Battery can't be replaced. Do not turn on the light while it's charging. Using the light while charging will cause damage to the AC adapter and decrease its life. )