This is useful set for HCS comaptible models. Ch1 Setting in the KR-415FHD is HCS mode.Features:The hard alumite aluminum gearBrush-less motorDual bearingsThe hard servo gear shaftThe aluminum top caseThe aluminum heat sink middle caseBlack cableGold plated connectorHCS CompatibleSpecifications:Torgue: 10.8Kg-cm Speed: 0.09sec/60deg(@7.4V)Torque: 8.0Kg-cm Speed: 0.10sec/60deg(@6.0V)Dimensions: 40.5x26x21mm (Low Profile)Weight: 51.0gOperating voltage: 6.0~7.4V (Lipo,Life,Ni-MH)
