The Aurora Xlerator Sideswipers DC Power Pack Transformer, Track #2728 & Controllers is a vintage slot car accessory from the United States, specifically designed for HO scale slotless cars by the brand Aurora in 1972. This product is a DC power pack transformer that allows for controlling the speed and direction of the slot car, providing an exciting and competitive racing experience for hobbyists and collectors alike. Compatible with various slotless car tracks and controllers, this transformer adds an extra element of fun and challenge to the slot car racing experience.