This is a Gex digital thermostat. It can also turn lights on and off. I used this for about two years as a backup for heating my reptile room and then stored it. 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 explanations of the switches in the photo section. You should be able to find more information by searching online. I prefer the easy-to-see, illuminated digital type like this one over the LCD type, so I bought and used several of these new about seven years ago. There are no major scratches, but please refrain from purchasing if you are concerned about signs of use. Thank you for looking.