This is an Exo Terra digital thermostat. It can also control lighting on and off. I've listed similar products in the past, but since this one has hardly been used, I've set the price higher. I discarded the suction cups because I didn't use them, but I'll include stronger ones (see photo). There are no instructions or box, but I've included a description of the switches in the photo section. You should be able to find them by searching online. I prefer the illuminated digital type like this one over the LCD type, as it's easier to see, so I bought and used several of these new about seven years ago, intending to use them for a long time. There are no major scratches, but please refrain from purchasing if you are concerned about signs of use. Thank you for looking.