This is the Tidy Track N Scale Roto Wheel Cleaner by Woodland Scenics.
Quickly clean all wheels at once
Works for locomotives and rolling stock
Won't scratch wheels
Power from transformer or track
Accommodates locomotives up to 6-3/8" and rolling stock up to 5"
One Roto Wheel Cleaner
One Power Connector
Two Sets Cleaning Pads
One Set Scrubbing Pads
This product is compatible with the following Model(s): Woodland Scenics TT4560,
WOODLAND SCENICS TT4560 Tidy Track Roto Wheel Cleaner N WOOU4560 by Woodland Scenics - B0062VH6RQ