The listing, Aquarium thermometer has ended.
The digital temperature display can be suctioned to the outside of the tank, while the other end of the cord stays inside where the climate is different and is what the LCD is reading. Get your pet's home to an accurate, safe temperature. Requires one AG-13 battery (commonly found in packs of 3 at the dollar store. I dont have a box for the item. Not sure if its waterproof, but there is a picture of a little fish with bubbles coming thru its gills so I would assume so, though it says "ESU Reptile" as well (I used it for my pet tarantula. Anything I didnt cover feel free to ask. Will ship within a couple days of auction ending.