Traxxas 6250 - TRX-4M BL Power SystemTraxxas 6250 TRX 4M Brushless Power System The TRX 4M Brushless Power System gives you up to 50% more speed and more crawling torque and precision than brushed power systems. Rip wheelies in your monster truck or navigate a technical crawling course in your custom High Trail rig. The new TRX 4M Brushless Power System gives you the best of both worlds! Brushless Power System for ALL TRX 4M Models! Field Oriented Control (FOC) for superior low speed