Multi Function Battery Operated Rainbow LED Fairy Lights Christmas Decorations with Timer. With a lit length of 20m and a 0.3m green power cable, these lights are the perfect addition to any festive display. Featuring 200 bright non-replaceable Rainbow LEDs, these are perfect for anywhere around your home or garden. Fitted with a selector button, there are 8 settings. Suitable for indoor and outdoor use (battery pack must remain dry at all times).