Portable: The LED night light is battery powered. It is equipped with a 1500mAh rechargeable battery that allows up to 48 hours of use. You can plug the light into a wall outlet at any time like a regular bedside lamp. You can unplug it if needed and carry the portable light overnight for added safety. Or bring it outdoor camping as a spare light. Dimmable - The nightstand lamp has a built-in touch sensor dimmer with 3 brightness levels that allow you to easily change the brightness by tapping the lamp. The lowest setting generates a soft light for better sleep. Its highest setting provides extra brightness for comfortable reading or nursery purposes without disturbing your sleeping partners or babies. Universal USB Charging - The rechargeable lamp comes with a USB adapter for charging. Even if you lost or forgot to bring its adapter, you can still charge the lamp by connecting the cable to any USB port, including laptops, power banks, wall outlets, or power strips. A Nice Home