Hobbywing XeRun XR10 Justock 1/10 Sensored Brushless Electronic Speed Control and Justock 3650SD 13.5T Brushless Motor Combo. The XR10 JUSTOCK ESC is specifically designed for Zero-timing racing class. Its timing system has been permanently set to ZERO degree. Using the same branded motor and winding will ensure that every racer will have the same power system for 100% fair and competitive racing. High-Efficient Heat Dissipating System. The modified heatsink, which increases the surface area, combined with the HOBBYWING patented copper heat-conductive plates which are attached to the MOSFET board allows the internal heat to be quickly transferred to the heatsink for dissipation. With the high-performing detachable cooling fan, a highly reliable heat transfer system for maximum cooling is accomplished. Single-button Programming & Factory Reset. The SET button on the ESC allows the user to easily program or factory reset the ESC with ease. Regular Firmware Updates Free of Charge. You can upgrade the XR10 JUSTOCK with the Hobbywing USB LINK software, a multifunction LCD program box and a laptop. Hobbywing updates its ESC firmware regularly giving you upgraded features more often when available. With its compact design, the XR10 JUSTOCK fits most chassis from 1/10th touring cars, 1/12th pan cars as well as F1. This ESC is designed for 1/10th scale touring cars & 1/12th scale pan cars as well as the ever popular F1 series cars for all Zero-timing spec racing, example the ROAR Sportsman class. When pairing this ESC with a 32T motor it will also form a professional and ideal combo for rock crawlers. 1/10, 1/12 on-road & CLUB competition and normal training. Motor Limit with 2S LiPo or 4-6 Cell NiMH. Motor Limit with 3S LiPo or 8-9 Cell NiMH. 2-3S LiPo; 4-9 Cell NiMh. 6V, 2A (Line-mode BEC). Powered by the stable BEC output voltage of 6V. 33.5×28.5×30.5mm/59.8g. Via the RX Cable (or Throttle Control Cable). Compliant with ROAR and IFMAR rules. High-temperature high purity copper windings maximize conductivity and reliability. Super low resistance multi-layers outlet PCB (Printed Circuit Board). Removable / replaceable rotor. High RPM precision bearings (Germany Brand: NSK). Powerful high temperature sintered NdFeb (Neodymium) magnets. High efficiency of energy conversion. 1:10,1:12 On-Road (Truggy / Drifting Car / F1 / Monster) & Off-Road (Buggy / 2WD SC Truck /Truck) STOCK / SPORT Race choose the motor base on competition rules. Free / casual run for new beginners. Rock Crawler (21.5T only). However, we may not be able to identify all defects. The difference often varies 24 hours or more. Please order with care. Once an order has been processed it cannot be canceled.