9 bright LEDs?? 3 Power Supply Modes: AC + USB + Biult-in Rechargeable Lithium Battery.</br>One Button Control: easy access power switch behind to power on/off and control two brightness levels.</br>Widely Used: suitable for music stands?? pianos?? orchestra pits?? desks?? tables?? dark clubs?? etc.</br>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.</br>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