Exceed RC 1/8 Scale Mad Torque 8x8 Crawler 2.4ghz Ready to Run Twin Waterproof Electronic Speed Controller (Note: ESC supports 6-7 cells Ni-MH battery only) True bead lock rock crawling wheels clamp onto aggressive rugged all terrain tires ensuring traction and grip in all types of terrain. The Mad Torque 8x8 is ready for any adventure. This system ensures interference free transmission to connect human to machine.