The Star Projector Cube helps to soothe restlessness and insomnia offering total tranquillity with its relaxing sound and light functions.The Star Projector Cube projects a calming night sky scene onto the ceiling whilst a soft lullaby fills the room creating a relaxing environment helping to relieve stress and tension. The user can choose between sound, light or both and is perfect for getting the little one off to sleep. The Star Cube Projector has a useful 30 minute timer so that energy is not wasted once the person has gone to sleep. The projector is supplied with a mains adapter but also takes batteries if you want to use it in a room without a plug socket.