Product Features: Dreamy colorful aurora star projection, you can manually switch the stars, clouds, moon mode and control the color of the clouds, generate more than ten kinds of nebula change combinations, or use the automatic mode, built-in timer, Bluetooth music, nebula speed adjustment, light brightness adjustment. At home, you can be under the dreamy starry sky and bring total relaxation. The timer (15, 30, 60 minute timing) can help you fall asleep easily. Product Specifications: 1. Power supply: AC power input AC110V-240v/50-60HZ, output USB 5.0V/2A 2. Laser wavelength: 532nm (green) 3. Laser classification: class 1 4. Speaker: 43W connected to mobile phone via bluetooth to play 5. Nebula Color: R G BX1W (Controllable Monochrome) 6. Energy consumption: less than 8W 7. Product working temperature: 10 to 40 8.USB power cable: length 1.5 meters 9. Body material: Environmentally friendly ABS