Product features:Dreamy colorful Aurora sky projection, you can freely manually switch the star cloud moon mode and control the cloud color, produce more than ten kinds of nebula change combinations, or use 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 wholehearted relaxation. Timers (15, 30, 60 minutes timing) can facilitate sleep.Power input: ac110v-240v/50-60hz, output 5.0v/2Laser wavelength: 532nm (green)LED (red, green, blue, white):4x1wSpeaker: 3W (Bluetooth connection)Shell material: ABS engineering plasticPower cable: USB interface length 1mRemote control: standard wireless remote controlPower adapter: American Standard British regulations European and Australian regulations comply with etl/ce/gs/saa certificationProjected area: 15-50 square metersProjection distance: 1.5-5mProduct size: 160 16080mm Product functions: colorful Aurora sky projection, free switching Nebula mode, light brightness adjustment, nebula movement speed adjustment, Bluetooth music, timing function, moon projection switch function.