Portable - The LED night lamp is battery-powered. It is equipped with a 1500 mAh rechargeable battery allowing up to 48 hours usage. Dimmable - The nightstand lamp is built-in a touch sensor dimmer with 3-levels of brightness which make it easy for you to change the brightness by tapping the lamp. The lowest setting generates a gentle light for better sleeping. Its highest setting provides extra brightness for comfort reading Also the Lamp offers you the 3 color variation- White - Warm White and yellow with adjustive intensity of the light . Materail :- Meatal Dimension:- 8 X8 x 9 Cm Universal USB Charging - The rechargeable light comes with an USB adapter for charging. adopter will not be a part of the box -