Alright, for those of you towing vehicles behind your RV, this Roadmaster brake light switch is one of those crucial components that makes everything work smoothly! Here's the deal - if you're installing a supplemental braking system monitor and your vehicle's original brake light switch doesn't work when the vehicle is in 'tow' mode, this universal switch is exactly what you need. The way it works is pretty clever - it sends a beam of infrared light to detect brake pedal movement. When the pedal moves down, it immediately sends a signal to your monitor that the brakes have been applied. What's great about this universal design is that it works on literally any vehicle with a brake pedal, and it's compatible with any supplemental braking system that moves the brake pedal and any motorhome monitor. The installation is straightforward, and once it's set up, you'll have that peace of mind knowing exactly when your towed vehicle's brakes are engaged and released. This level of specificity helps ensure your supplemental braking system is positioned properly and working as it should. No more guessing games or worrying about whether everything's functioning correctly while you're on the road. It's one of those safety features that you might not think about until you need it, but having that reliable communication between your towed vehicle and RV monitoring system makes towing so much safer and less stressful. Whether you're a full-time RVer or just take occasional road trips with a towed vehicle, this brake light switch is definitely worth the investment for that extra layer of safety and confidence on the road.