Description: Mini round digital design,clear & simple LCD display,allows you to easily know the environment temperature and humidity around you. Overall Diameter: Approx.45.2mm/1.78inch; Opening Diameter: Approx.41mm/1.61inch; Rated Voltage: DC 1.5V. Temperature Measuring Range: -50~70℃,accuracy:±1℃ (at normal temperature); Humidity Measurement Range: 10%~99%,accuracy:±5% (Measures conditions every 10s). Measure indoor humidity and temperature in time,help to adjust the humidifier, dehumidifier settings and humidistats, great for family's living conditions and health. Wide Application: Applicable for fish tank, reptile habitat tank or box, home, office, car, schools, hotels, laboratories, kindergartens, aquaculture, instrument workshop, libraries, schools, factories and places equipped with air condition, etc. Specification: Product Name: Digital Thermometer Humidity Material: Plastic + Electronic Components Overall Diameter: Approx.45.2mm/1.78inch Opening Diameter: Approx.41mm/1.61inch Rated Voltage：DC 1.5V Humidity Measurement Range: 10%~99%; Accuracy:±5% (Measures conditions every 10s) Display Resolution: 1% Temperature Measuring Range: -50~70℃; Accuracy:±1℃ (at normal temperature) Weight: 25g (without battery) Installation Type: Embedded Installation Package Includes: 2 Pieces Digital Temperature Humidity Meter Black 1 Piece Digital Temperature Humidity Meter Green Note: Please allow small error due to manual measurement. No contain batteries.