4 Inch Wall Thermometer, Indoor Outdoor Humidity Hygrometer, Analog Ear: 12x8 cm or 4.7x3 inches The 2-in-1 thermometer and hygrometer accurately measures the temperature range from -30 to 50C, -20 to 120F humidity range from 0 to RH 4 inch round waterproof plastic housing, alloy disc and alloy housing, adapt to four seasons and climate No battery, built-in temperature and humidity sensor, will automatically detect and accurately measure, no need to calibrate Fahrenheit and Celsius temperature scales, large and clear reading easier and hanging it on the wall or door Suitable for greenhouse, warehouse, office, wine cabinet, garden, patio, home, etc - Inner mesh panties Material: alloy housing and plastic coating Diameter: 100mm or 3.94 inch Type: Hygrometer Humidity Indicator Temperature range:-30-50C Temperature accuracy: 2 C Temp Resolution: 1C Humidity range: 0- RH Humidity accuracy: 2 percent RH Humidity resolution: 2 percent RH The package includes: 1 pc. Hygrometer humidity meter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.