Radar-based vehicle detection usually means bolting a dedicated unit to your cockpit on top of your lights, but Lezyne folds the whole thing into a front-and-rear light set. This is a demo unit of the Radar React System — same as the standard SKU but lightly used, carrying the full warranty and shipping without retail packaging. It pairs the React Drive front light with the Radar Drive rear light, and once you've done the initial pairing through the app, the two talk to each other wirelessly with no phone or GPS computer required to keep working. If you want closing-traffic awareness without cluttering your bars, this is the version that lives inside your lights instead of alongside them.

Because it's a demo, you're skipping the box, not the substance. Mechanically and functionally it's the standard Radar React System — nothing about the specs or performance differs from the boxed version, and it's covered by the same full manufacturer warranty as a new set.

The way it works in practice: the rear-mounted Radar Drive detects vehicles approaching from behind and communicates that to the front light. The React Drive then fires rider-facing LED indicators and audible alerts so you get the warning at the front of the bike where you're already looking. The Radar Drive also throws a distinct flash pattern when it detects a car, so drivers get a heads-up too, and that flash works whether or not the lights are paired to anything else.... Read More