This is a weather clock, can clearly show the temperature and humidity, easy to read, can show the humidity and temperature trends.Features:Measuring indoor and outdoor temperature and humidity, Celsius and Fahrenheit conversionHighest and lowest temperature humidity memory functionView historical temperature and humidity dataConnect up to 3 outdoor units (package with one outdoor unit)Comfort indication, temperature and humidity trend indicationlarge screen no-view LCD display.The outdoor unit can be suspended by hangings holes or standing on a horizontal surface.Specifications:Material: plasticTemperature measurement range: -19.9 to 70 ( -3.8 to 158)Humidity measurement range: 10%~99%RHTemperature display resolution: 0.1 or 0.1Humidity resolution: 19%RHWireless measurement distance: 50 metersPower Supply: 2 * AAA battery (not included)Item size: 110 * 80 * 25mm \/ 4.3 * 3.1 * 1.0inPackage size: 150 * 130 * 35mm \/ 5.9 * 5.1 * 1.4inPackage weight: 160g \/ 5.6ouncePacking List:1 * Wireless Weather Station1 * Transmitter1 * Manual