3 Wireless Transmit Sensors The 3 remote sensors can be put in three different places whatever indoor or outdoor. The thermometer can display the indoor temperature and 3 sets of outdoor temperature and humidity simultaneously. Besides, the rate of changing icon detects rapid changes in temperature and humidity. The station and transmitter signal distance is 100M/328ft (open area).Large Backlit LCD Screen Large LCD display with simple and clear readings. You can press the "Light" button to turn on the backlight. This helps you to read the data clearly even in the dark. And then, the digital hygrometer will automatically turn off after 10 seconds if without any operation.Accurate Max & Min Record Max & Min record functions on indoor and outdoor on both temperature and humidity. The data update every 60 seconds. Press the /F button to switch between Celsius and Fahrenheit. Perfect on your house, office, factory, restaurants, warehouse baby room and so on.Humidity Expression Indoor temperature (0 - 60); Outdoor temperature (-40 - 60); Humidity (10% - 99%). The temperature and humidity accuracy: 1 / 5%; Wet: humidity65%; COM: 45%humidity65%; DRY: humidity45%. The express changes following the changing of the humidity.2 Mounting OptionsIt can be stand in the desk or hang on the wall as you like. The station needs 3*AAA Battery; Sensor needs 2*AAA Battery (not included). The battery life is minimum 12 months for base station with one sensor. When the sensor shows the low battery icon that means you need to change the new battery in the sensor. All products are protected by our 60 Day Money Back Guarantee & 12 Month Warranty.