Kellerman indicators are brilliantly bright, and add a far more sleek look to your BMW R nineT or R12. Kellermann high power LED technology State-of-art "IC"- chip technology 32 MHz real time micro processor controlled Silent-Current, advanced Power Saving algorithm High measure of visibility across a wide angle range Suitable for 12 volt DC applications Flow-optimized metal housing, high quality manufacturing M8 x 20mm thread High-quality vibration-absorbing bearing BMW R9T & R12 Fitting Tips; Will work directly with the BMW R9T electrical system if you are already running LED indicators, bulbs may require resistors - see link below. We recommend using the following electrical adapter to make the fitting of these easier. Electrical Adapters, find them HERE Rizoma resistors for fitting LED to bulb set up, find them HERE