The TS3JB Outdoor Temperature Sensor can be added to a WTTK or WTTKWL Wall Control installation and is used to delay fan operation if the outdoor temperature is too warm to provide cooling. 
 
The TS3JB sensor connects to the back of the wall control using 50' Plug&Play cable included. 
Compatible with WTTK and WTTKWL controls.
Delays fan operation if outdoor temperature is too warm to provide cooling.
5 Year Warranty.