Temperature Sensor, Wireless Outdoor, Humidification Control 0 to 100% RH, condensing, Temperature Limiting -40 to 140 Deg F, Batteries Included Yes, Battery Power Source, Vertical Mounting with Supplied Bracket and Mounting Hardware Mount, Gray, 5 inch Height, 3-1/2 inch Width, Includes 2 AA Lithium Batteries and Mounting Hardware, For Use With: RedLINK™ Enabled Thermostats and Accessories