Spektrum 4100 DX4R Pro 4CH DSMR Racing System This is the Spektrum DX4R Pro 4-Channel DSMR Racing System.Features:Adjustable trigger shape and tension 50-Model memory with ModelMatch technology Pre-set mixes, including dual throttle, dual brake, MOA, 4WS, and dual steering On-the-fly mix rate control Traction Control and ABS Integrated antenna Includes the SR2000 DSMR micro race receiver and SR410 4-channel DSMR sport receiver Left-hand configurable (parts to po