TCS WAUX-KA2, Keep Alive:
 
TCS Keep-Alive® (KA) devices are used to supply power to decoders during times of power interruption due to dirty track or problematic track work. 
 
Newly-redesigned at half the size of a KA4, the KA2 will power HO or N scale locomotives with approximately one-third of the capacitance of KA3/KA4 devices (depending on the locomotive and motor).
 
The WAUX-KA2 includes the auxiliary harness for the WOW101 sound decoder line with a KA2 Keep-Alive® device attached.
 
This harness can be used to connect the following functions to a WOW101 decoder:
 
2x Purple wires for Speaker + and Speaker -
 
Blue wire for connecting light functions and Keep Alive®
 
Black with White stripe wire for connecting Keep-Alive®
 
Tan wire for CAM input
 
Pink wire for Function Output 4
 
Brown wire for Function Output 3
 
The WAUX-KA2 is designed for use with the TCS WOW101 ONLY
 
MSRP is $41.95. (Picture courtesy of TCS.)