Features: Temperature measurement range is -30 - 50C/-20 - 100F, Humidity range: 20~99%RH. No battery needed: never bother to use batteries; Our thermometer works well without battery because of its mechanical power. Back hooks make the thermometer suitable to install on wall or just put on your desktop. You can apply it in houses, offices, workshops, schools, markets, warehouses, kitchen and more. The special and beautiful design allows it to be applied as an ornament as well. Specifications: Material: Plastic Type: 120A/130B/130Y(optional) Temperature range: -30~50 Measurement accuracy: temperature 2; humidity 5% Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Wall Thermometer