How cold IS it outside? Now you know! Stickler is the easy-to-install and easy-to-read outdoor thermometer. Simply clean the outside of your window, attach Stickler using the included suction cup, and get an instant weather report! It is completely waterproof and weather-proof and can withstand the harshest climates and still deliver accurate temperature readings, all while staying put on the window. Includes both Fahrenheit and Celsius scales. Reads from -20° F to +120° F. From your kitchen to your living room, you won't even notice it there until you need it!