The Space and Stars 3D night light is charged via a USB cable. When it is fully charged, if you use it in Eco mode ie for a few minutes a day it can last up to a month. Joke aside, the lamp can be used for a while, about 2 hours after charging, and then it has to be recharged. Charging takes 2 hours. Or it can always be on a USB charger if you get tired of charging. The lamp turns on and off by touch. It is great decoration for your home or office. You can buy it as a birthday or Christmas gift!