The silent rotation function makes the stars and moon on the ceiling move, which can create a pleasant and relaxing bedtime atmosphere for children, to comfort babies, especially those who are afraid of the night. Perfect for decorating your bedroom or living room into a colorful starry sky at night on birthday, wedding party or festival. With 2 sets of slides, one is a beautiful starry sky and the other is a romantic couple. Packed in a box, it could be a special gift for your lover, children, friends or colleagues. Power Supply: USB Charge Light Source: 3 LED USB Cable Length: 3.28ft Net Weight: 250g Input Voltage: 5VDC Product Size: 4.52inch * 4.52inch * 6.02inch Two-button Controls: Switch Key: Turns on/off the projector, but also changes the light color to white, blue, red and colorful. Press shows white light; the second press shows blue light; the third press shows red light and the fourth press shows colorful light; the fifth press turns off the light. Rotary Switch: button