While the all new SIDEWINDER 4 builds upon Castle’s most popular platform, the SIDEWINDER 1:10 SCALE SERIES, it is the first of its kind to run Castle’s newest technology, CRYO-DRIVE. CRYO-DRIVE combines technology from cutting-edge hardware and software advancements to increase thermal performance. COOLER TEMPS mean LONGER RUNS and MORE POWER in your SIDEWINDER 4 setup. 2s – 3s LiPo; 6 – 8 cell NiMH use in vehicles up 6.5lbs with battery, ready-to-run. Sensorless brushless and/or brushed motor operation. Sidewinder 4 ESC and motor. Quick Start Guide 1/10th scale gearing chart Decal sheet. Shop everything you need for your hobbies at Mark Twain Hobby Center! We are sure we can work out any issues that might come up. Thank you in advance for your feedback! We do not mark merchandise values below value or mark items as “gifts”, US and International government regulations prohibit such behavior.