Product Description Power: 2W Light source: LED Material: ABS Voltage: 4.5-5 Power supply: USB or 3AAA battery (not included ) Projection area: 3-5 square meters Control mode: on/off Projection area: 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 nebula on ceiling or wall (as shown in the pictures on the left when the dome cover is removed will) to give kids a comfortable and relaxing bedtime experience, soothe and comfort kids to sleep, also perfect for adults to bring relaxing and calming effect. 2. 8 Aurora Projection Modes- Red, Blue , green and 3 colors allochroism, gradient color, you can choose which one according to your mood e color is to be displayed. All color combinations show you the relaxing magical world. A 45 degree tilt allows you to project the light straight up or point it in a different direction. So you can cover a larger area and get the wide panorama effect 3. Auto power off - Auto power off After 1 hour, you can use it to go to sleep and it will shut down by itself, which is very convenient in the children's room. 4. Safe for Use- The laser power is less than 5mW, Class IIIA is safe and will not hurt eyes under normal use. 5. FRIENDLY DESIGN WITH OPTIONAL POWER SUPPLY Power pressure of USB -cable (included). This skylight offers a unique, almost mesmerizing view wherever you place it. Bring a romantic or peaceful atmosphere to your home party entertainment or leisure time. With an extremely quiet motor, the star projector makes very little noise, ensuring your kids have relaxing starlight in a quiet environment.