Plug the USB into a computer or any charging port,lights up and provides a festive glow when plugged in as it chargesyour phone. the multicolorlights are the elf on your keyboard. You'll be excited all year.Specifications:1. LED Qty: 10 pcs2. Total Length: 50inch3. Light color: Red Green Blue White Yellow 4. This product does not have a data transmission function. When not charging, it can be used as a decorative light string.5. Keep out of reach of children.6. If you have any problem with this item, please contact us directly, and we'll provide help.Package list: 2x usb charging cable