FasTrack(tm), the industry leading track system is innovative and more realistic than any other system - and easy to use. New in American Flyer FasTrack for S gauge! Includes Remote Control activator button Compatible with ASC & ASC2 for LEGACY(tm) operation PRODUCT SPECIFICATIONS Gauge: S Gauge Brand: American Flyer Power: Electric Dimensions: Length: 5" WARNING: CHOKING HAZARD - SMALL PARTS! NOT INTENDED FOR CHILDREN UNDER 3.