Velineon VXL-3s Brushless Power System, waterproof. The ultimate upgrade! The key to the Velineon´s extreme power output is total system optimization. All of the components are carefully engineered to work seamlessly together. From the Traxxas High Current battery connector, to the powerful Velineon 3500 brushless motor, all parts of the system are optimized to eliminate restriction and allow maximum power flow. High-frequency transistors and advanced circuit design delivers incredibly smooth and refined throttle control.