They are a bit like spaghetti, but 1 set is blue, 1 set is white. Blue seems to work completely, white has a few out. Both sets plug in.
There are a couple of battery sets all mixed up. With these.
Been sat in our loft for years, so no promises on reliability but free if you want to take a chance.
Box of Christmas lights (Darley Abbey DE22)
This offer has been gifted to someone and is no longer available.