°C/°F Wireless Weather Station Thermometer Hygrometer With 3 Sensor Forecast Temperature And Humidity IndicatorProduct Features:Indoor & Outdoor Temperature & Humidity Measurement, Celsius & Fahrenheit ConversionHighest & Lowest Temperature Humidity Memory FunctionView Historical Temperature & Humidity DataConnect Up To 3 Outdoor Units (One Outdoor Unit Package)Wo High Magnetic Magnets On The Back Of The Main Unit, which can be attached to metal objectsOn the back, the main unit has a bracket that can stand horizontallyHigh sensitivity touch controlled by buttons for easy operationComfort indication, temperature and humidity trend indicationHTN large screen without view LCD displaywith backlight backlight turns off automatically after 10 seconds without operationThe outdoor unit can be suspended through hanging holes or standing on a horizontal surface. XP4 Outdoor Unit WaterproofProduct Parameters:Indoor Temperature Range:-4°f-158°f (-20°c-70°c)Outdoor Temperature:-40°f-158°f (-40°c-70°c)Humidity Range: 20%-95%Comfort Display: Dry, Comfortable, WetTemperature Display Unit: °c/°f optional (default is °c)Temperature Resolution: 0.1°c/°fHumidity Resolution: 1%Refresh Rate: 10 seconds. Error: Temperature is plus or minus 1 °c, humidity is plus or minus 5% Wireless Receiving Range: 60 meters/197 feet RF Radio Frequency: 433 MHz Power Supply: AAA Battery (