The X Version Sine Wave Controller for the Sur-Ron X offers significantly enhanced performance over the stock unit, with smoother power delivery, regenerative coasting, and plug-and-play compatibility. Features Sine wave control for smoother and quieter operation than square-wave controllers Approximately 20% more torque and ~10% increase in top speed over stock controller Regenerative braking activated at around 8mph, with option to disable regen via eco mode Plug-and-play installation compatible with newer motors (post-February 2018 models) Specifications Controller type: X Version Sine Wave Overall efficiency: approx.98.5% Dimensions: 240mm × 110mm × 50mm Package weight: 3kg (as provided) Power modes: Eco and Sport Vehicle Fitments Compatible with Sur-Ron models equipped with newer motor (post-Feb2018 P/N motor version) Not compatible with older motor version P/N: 11100-YQ2A-0100