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The RSx standard-size series goes serial and keeps its core performance. The RSx4S Power H.C. runs with the 4S selector included, so you can switch between preset models in seconds. Paired with EX-NEXT advanced mode, it responds faster than before. Telemetry on EX-NEXT lets you change the servo's ICS parameters from the radio. EX-NEXT also supports standard communication, so it works with the serial KR-420XT and a wide range of receivers. Compared to the brushless Grasper STD, the coreless RSx4S has a milder feel. Pick the one that matches your machine, course and driving style. Reinforced stainless steel final gears add durability. Fits Align T-Rex 250, 450, 500, 550, 600 and 700.
