This is the soothing table lamp that casts a glowing simulation of a soothing rainbow against a wall. The LED lamp rotates 90 degrees, allowing it to project its image at different angles; the farther away a lamp from a wall, the greater the projection of a rainbow on a wall. Plugs into the included USB power supply with a 3' cord. Sturdy aluminum construction. 10 1/2" H x 4" Diam.