Product Description Touchscreen Wireless Weather Station/Hygrometer with 3 Predictive Sensors Product Features: Measures indoor and outdoor temperature and humidity, Celsius and Fahrenheit conversion Maximum and minimum temperature and humidity memory function View historical temperature and humidity data Connects up to 3 outdoor units (one outdoor unit included in the package) Two strong magnets on the back of the main unit for attaching to metal objects A stand on the back of the main unit allows for horizontal placement High-sensitivity touch button control for easy operation Comfort level indicator, temperature and humidity trend indicator High-definition large LCD screen Backlit, automatically turns off after 10 seconds of inactivity The outdoor unit can be hung via mounting holes or placed on a horizontal surface. Outdoor Unit XP4 Waterproof Product Specifications: Indoor Temperature Range: -4°F - 158°F (-20°C - 70°C) Outdoor Temperature Range: -40°F - 158°F (-40°C - 70°C) Humidity Range: 20%-95% Comfort Level Display: Dry, Comfortable, Humid Temperature Display Unit: Celsius/Fahrenheit Selectable (Default: Celsius) Temperature Resolution: 0.1°C/°F Humidity Resolution: 1% Refresh Rate: 10 seconds. Error: Temperature error ±1℃, humidity error ±5% Wireless receiving range: 60 meters/197 feet RF frequency: 433MHz Power supply: AAA batteries (batteries not included) Main unit dimensions: 95 * 24 * 112 mm Transmitter dimensions: 100 * 35 * 20 mm Package list: (Includes retail packaging) 1 * Main unit weather station 1 * User manual (English) 1/2/3 * Forecast sensor transmitter