TCS DP2X-KA, HO Scale Motor Decoder:
This full featured, 2 function, Direct Plug decoder is designed to easily plug into a vast array of locomotives with 8Pin NMRA Sockets. The 8-Pin NMRA plug built directly into this decoder make installation a snap. Included is our auto-adjusting BEMF for outstanding slow speed performance and hassle free set up. Also includes Quiet Drive for super quiet engine performance.

Attached is an extra Blue wire and the Black w/ White Stripe wire for use with a TCS Keep Alive™.
 
MSRP is $48.95. (Picture courtesy of TCS.)