Product descriptions Power: 2W Light source: LED Material: ABS Voltage: 4.5-5 Power supply: USB or 3AAA battery (not included) Projection range: 3-5 square meters Control mode: toggle on/off Projection range: 2-5 square meters Product appearance: black, white Place of use: indoor use only Product size: 90mm in diameter and 100mm in height 1.Amazing aurora projector light - Project realistic active aurora borealis and nebular on ceiling or wall (as shown in the pictures on the left when the dome cover is removed), create an enjoyable and relaxing bedtime experience for children, soothe and comfort kids to sleep, also perfect for adults to attain a relaxing and calming effect. 2.8 Aurora Projection Modes- red, blue, green and 3 colors allochroism, colors gradient, you can choose which color show depending on your mood. All colors combination shows you the relaxing magic world.45 degree tilt, allow you to project the light straight up or point in a different direction, convenient for you to cover a larger area and get the wide panoramic effect 3.Automatically Shut Off - Auto Shut Off After 1 hour, you can go to sleep with it and it will shut down on it's own, really convenient in kids bedroom. 4.Safe for Use- The laser is under 5mW , Class IIIA is safe and will not hurt eyes when normal using. 5. FRIENDLY DESIGN WITH OPTIONAL POWER SUPPLY Power pressure of USB cable(included). This skylight adds a unique almost Hypnotizing view wherever you put it. Bring a romantic or peaceful atmosphere for your home party entertainment or leisure. With an ultra quiet motor, the star projector makes very little noise and insures your kids will have relaxing starlight in a quiet environment.