Waterproof and sticky: the transparent temperature meter is waterproof and can stick to the window or door tightly, no need to worry about moisture or water Detachable and simple assembly: the waterproof thermometer is detachable to clean and recalibrate, simply stick on the window after tearing off the protective film Precise and Accurate: The self-adhesive thermometer built into the highly sensitive precision bimetals will accurately reflect the rapidly changing temperature to let you know the weather conditions Multi-functional weather monitor: This window temperature monitor can be mounted on an outdoor glass, you can clearly know the outside temperature at home and change your clothes according to the weather. data displayed No batteries required: The outdoor window thermometer is economical, battery-free, environmentally friendly and can be easily installed on the window outside. sticker help