With USB cable, the cable length is 1 meter. Ordinary model: battery 2000mAh, LED: water pattern RGB three colors + combination color. Button touch switch. Projection area: 20-80 . Colorful Lighting Combination ProjectionThe star projector has 3 projection lenses - water wave with 6 colors, unique moon and starry sky. You can singly choose the ocean ware lights mode or the moon and star lights mode, or combine them together. The sky projector features 13 kinds of light effects, High-resolution stars, and moon rotate on the ceiling or wall, and colorful nebula cloud float quietly under the night sky, letting you experience the colorful starry sky night. Put it Anywhere & Timer FunctionBuilt-in 2000mAh large capacity rechargeable battery can support 2-3h projection after being fully charged, more environment-friendly and convenient than other star projectors. It takes 3-4 hours for a full charge and can be placed anywhere at home without a power source. The galaxy projector has a timer function, which automatically shut down after 4H, with no need to get up again to turn off the projector, helping you reduce unnecessary power consumption. Unique Gifts for Family or FriendsTo bring the stars into your home, you only need to purchase a galaxy light projector, and your house will come to life with the wonders of the universe. This projector casts images of the beauty of space right onto your walls and ceiling, helps soothe small children, develops children's talents and creativity, stimulates children's interest in astronomy, illuminates a party and creates a romantic dating atmosphere for you and your lover.