The Gro1 Wireless Weather Station + Sensor allows you to remotely keep track of the temperature and humidity in multiple locations with the convenience of a centralized display unit. The station comes with 1 sensor, but can pair with up to 3 Gro1 Wireless Sensors, each with a wireless range of up to 165 feet.  Additional sensors may be purchased separately here.  The high contrast display shows the date and time, current moon phase, weather trend indicator, temperature, humidity, electronic forecast, and the indoor comfort level.  It also features an Alarm and Snooze function.  Place a sensor in your greenhouse, grow room, back porch, basement, garage or anywhere else you are interested in knowing what the temperature and humidity are.