This is a additional sensor for use with the XIKAR PuroTemp™ Wireless Hygrometer System. This unit can be used as a stand alone Hygrometer and is a good choice if you will have or already have more than one humidor. 

PuroTemp™ Wireless Hygrometer System Features:

• Humidor temperature & relative humidity display
• Ability to monitor up to 3 humidors within a 60ft range
• High & Low temperature/ humidity alerts
• Temp. display in °F or °C
• Temp. Range: –13 to 140 °F or –25 to 60 °C
• Relative Humidity Range (RH): 20% to 95%
• Accuracy (RH): +/- 2% (Temp): +/- .1 °C
• Four function keys: CH, SELECT, UP, DOWN
• 12 / 24 Hour Clock
• !This hygrometer is not user calibratable!