1.Measurement range: temperature measurement range is -20 - 120F (-30 - 50C) 2.No battery needed: never bother to use batteries; Our thermometer works well without battery because of its mechanical power;Therefore it has a longer service life in use 4.Hooks on the back: back hooks make the thermometer suitable to install on wall for garden, patio, bathroom, kitchen, planting room, and many other occasions 5.Quality material: made of plastic case and pure copper structure, without any battery, you have no need to worry that the product will rust; And it will work normally for a long time by itself 6.Various usages: you can apply it in houses, offices, workshops, schools, markets, warehouses, kitchen and more; With nice precision and attractive color to distinguish, it can match with other decorations; The special and beautiful design allows it to be applied as an ornament as well