Dwarvin DVDFL203 N Scale Lamplighter DFL with Adapter For Fiber Lighting Systems Truggy Radius Arms and Trailing Arms Radius Arms and Trailing Arms 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 The 3 wires from the detectors and crossing bell need to be attached to the DFL unit using screws built into it There is absolutely no programming nor soldering required