Outdoor Thermometer, Window Self-adhesive Transparent Waterproof Thermometer Free Battery CLEANING METHOD- A double-sided sticker is a plastic tie. The product can be removed from the plastic fastener. Once the dust on the dial is removed, the product can be conveniently looped. Ideal for every room in the house.EAZY TO USE: Wipe the outside of the window glass or door with a cloth, tear the protective film on the products double-sided adhesive, hold the product and place the product outside the window or on the glass in front of the door. By closing the window or door, you can read the outside temperature inside.HIGH QUALITY- 3MM thick clear acrylic plate is used as a thermometer dial and the heart of the watch is stainless steel. Double-sided adhesive strong and coated, the product has a rain-proof function.NOT NEED BATTERY- The door and window thermometer is a pointer type meter. The internal precision bimetallic is sensitive to the temperature change of the detection environment.FAST TEMPERATURE MEASUREMENT- the function of the product is not affected by a hostile environment. It can accurately and quickly measure the outside temperature.