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The RSx standard-size series, now serial compatible. It keeps the proven performance of the RSx line and works with the EX-NEXT advanced mode for quicker response. Telemetry on the EX-NEXT lets you change the servo's ICS parameters from the radio. EX-NEXT supports conventional HCS and standard communication, so it works with serial-compatible receivers like the KR-420XT and many others. A 4S servo model selector is included for switching between preset models. Compared with the brushless Grasper STD, the coreless RSx4S has a milder feel. Stainless steel final gears add durability. FITS: Align T-Rex 250, 450, 500, 550, 600 and 700
