5V low voltage, low heat. Good contact and safe for children. perfectly, with a USB connection, you don't need a power outlet all the time. Therefore, you can flexibly connect it in the room, using USB mobile power, you can use it flexibly. (Excluding USB plug)The cotton ball light looks very warm, comfortable and light, and the chain is made of very beautiful, comfortable light, not dazzling. The light is soft and pure, creating a light fairy effect in the dark.Where can I use it? Daughter's room, cupboard, teepee decoration, cupboard, wedding, Christmas, party decoration, Halloween decoration, indoor and outdoor decoration, handicrafts, gifts, etc. This earth light chain shines comfortably and brightly, which is a good idea.Slightly waterproof, but USB is not waterproof. The distance between the two lamps is 15 cm, and the diameter of the cotton ball is 6 cm. Create an immediate atmosphere for the room and interior.Colour: as shownMaterial: cotton + electronic componentsPackage Contents:1 * LED string ball light (pink gray and white, 2 meters, 10 lights, USB constant light)Only the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.