Vizi-Tec SupaBrake-II Brake Light Modulator - Triumph Thunderbird Storm Fits Triumph Thunderbird Storm - Please specify the exact model and year of your bike at check out. Smart brake light modulator with built in algorithm that adapts to your riding style. All weather proof (IEC 529 IP 6.7 standards) Simple Plug & Ride Installation with a 10 Year warranty! All motorcycle mfgs available, see other listings. Please visit us at www.vizi-tec.com for user manual.