Super easy to put up, love the fact that they're solar powered, the ones I got are pink. They're freaking adorable. I got them wrapped around my porch right now, very easy to hang/install. There is no adhesive backing. They're just a string light. There is no connector. Everything is already connected, it's ready to go. I placed my solar panel in a flower pot sitting on my porch, it works perfect, no hassle with these whatsoever Let it charge and they'll turn on when the sun goes down and they'll turn off when the sun comes up. They're perfect for me and the girls we love them.!