Dwarvin DVDFL203 N Scale Lamplighter DFL with Adapter For Fiber Lighting Systems Truggy Undecorated Kit Undecorated Kit The 6S compatible power system of this updated and upgraded model features an exclusive Spektrum™ Avian™ Dual Smart ESC that combines with the AR637TA receiver in the BNF® Basic version to provide real time telemetry data — plus optional use thrust reversing for shorter rollouts after landing — along with the advantages of AS3X® and SAFE® Select technologies Dwarvin DVDFL203 N Scale Lamplighter DFL with Adapter For Fiber Lighting Systems The 3 wires from the detectors and crossing bell need to be attached to the DFL unit using screws built into it