This advanced system integrates radar technology into our industry-leading LED front and rear bike light set. Riders can now receive audio and visual alerts through multiple devices:Lezyne Radar Ally smartphone appCompatible GPS bike computers, orDirectly via the React Drive front bike lightThe Radar Drive pairs with the React Drive to complete the Radar React System. Rear-facing LED indicators and audible alerts are custom-built into the React Drive, providing real-time notifications of rear-approaching vehicles—no smartphone or third-party device required.This all-in-one system delivers TOTAL VISIBILITY: radar-based vehicle detection, disruptive daytime flash patterns, and up to 1200 lumens up front for effective night riding.All of this is backed by our exceptional R&D, in-house manufacturing, and premium features like IPX7 waterproofing and USB-C charging.Welcome to the future of bicycle visibility: activate your Cycling Sixth Sense.Note: A smartphone is required for the initial pairing of the system.• Includes Radar Drive taillight and React Drive Front light • Custom programmed wireless system connects both lights and features advanced radar vehicle detection• Cross compatible with select Ant+ head units, the Radar React System takes visibility and safety to the next level• Features Lezyne premiere LED technology, optics and lenses• Manually control both lights through Radar App• React Drive Front features built in LED indicators that alert of approaching vehicles from behind when connected to Radar Drive • IPX7 Waterproof with USB-C charging portsVehicle detection radar system, front & rear led pair, react drive front 1200 lumens, radar drive 300 lumens, connects to radar app