Inspiration for Sponge's name and design language came from sponges in the forest. The organic design and soft shapes make Sponge an incredibly elegant series that is suitable for both inside and outside the home. The built-in rechargeable battery makes it easy to grab Sponge and take it with you wherever you go.Adjust the brightness of the light in three steps to create the perfect ambience. The battery lasts up to five hours at full power and even longer if the light is turned down to a cosy lighting. The battery can easily be charged by placing the lamp on the charging dock included.