This is the Traxxas Velineon Brushless Power System VXL-3s Electronic Speed Control and Brushless Motor (Waterproof Version). This is the same setup that comes in vehicles like the Traxxas Rustler VXL, Stampede VXL, and Bandit VXL. This system is capable of speeds over 70 MPH in the Rustler stadium truck! This is also an excellent upgrade motor for the Traxxas E-Maxx 16.8V, E-Revo, and Traxxas Slash vehicles!