1. Temperature Measurement Range: 30℃ to 50℃; Humidity Measurement Range: 20%RH to RH; Overall Size: 75 x 24 mm/ 3 x 0.94 inch (Dia.Thickness) 2.Advantage: 1. The outdoor thermometer is made of ABS plastic, good weather resistance, air automatically senses, can be used outdoors for a long time. 2. There are airflow circulation holes on the back of the dial for more accurate readings. This weather monitor can be manually calibrated for temperature and humidity on the back(No battery needed). 3. This thermohygrometer features a Celsius scale and a sophisticated colorcoded dial for easy monitoring of temperature and humidity 3.Instruction: There are two ways to use it: 1. Place on a desktop or other flat surface with the included base. 2. There are hanging holes on the back of the dial, which can be hung on the wall. 4.Application: This is a wall thermometer and hygrometer with a clear number scale to facilitate realtime remote monitoring of weather conditions. It is widely used in mason jars, planting, maintenance, greenhouses, gardens, courtyards, kitchens, factories, warehouses, etc. It can be used as decoration.