Features: No battery required, long-lasting resistance, accurate physical temperature measurement, no battery silence, no radiation. Diversifiedusage, available for hangings and standing, temperature and humidity meter can be placed on desks, bedside tables, and wall. You can choose between two. Physical temperature measurement, reliable measurement, faster efficiency/more stable performances/accurate temperature and humidity. Glass material with transparents mirror, clear and visible handwriting,aluminum wrapping, sturdy and durable. Understand temperature and humidity, three color temperature and humidity indication, comfortable ranges prompt for temperature and humidity, simple and easy to understand. Specifications: Material:ABS,Aluminum Color:White,Blue Temperature measurement ranges: -20-50 ℃ Humidity measurement ranges: 20%RH-100%RH Temperature measurement accuracy: ±2℃ Humidity measurement accuracy:±5% (40-70%) Diameter:75mm/2.95'' Thickness:23mm/0.9'' Hight:87mm/3.42'' Package Includes: 1x Thermometer and Hygrometer note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.