Sponge is named after sponges in the forest where the inspiration for design shape and expression is also found. The simple design and soft shapes make Sponge an incredibly elegant series suitable inside and outside the home. With the built-in battery Sponge can be placed and moved as you like and simultaneously the brightness of the light can be adjusted in three levels. The battery has a durability up to five hours at full power and even longer if the light is turned down to a cozy lighting. The battery is easily charged via the included USB cable.