All in a nights work! 16-light LED illumination Two independent tilting heads Screw-mount holes on base to secure accessory to layout (optional) Plug-Expand-Play Accessory Connects easily to FasTrack with a Plug-Expand-Play Lock-on (sold separately) Connects to a traditional O/ O27 track lock-on or to an accessory power supply (lock-on and power supply sold separately) Can be upgraded to command control with the purchase of a SC-2 Switch Controller or an ASC2 (both sold separately)