Compact, aero-post compatible rear LED featuring a Daytime Flash mode and our custom programmed \\\"Alert\\\" technology. It\\\'s equipped with our Wide Angle Optics lens that provides up to 270° of visibility and two high powered LEDs. When decelerating, the light will turn solid like a brake light and then provide a distinct flash pattern once stopped to alert riders or vehicles from behind. The light will then change back to its previous output mode once the rider resumes his or her ride. Its co-moulded construction is super light, yet durable and has an IPX7 waterproof rating. The KTV Pro Alert Drive provides up to 75 lumens and has five output/flash modes. This KTV Pro features an integrated USB stick for convenient cable-free recharging and offers up to 14 hours of runtime. Key FeaturesDaytime Flash mode. Custom programmed \\\"Alert\\\" technology. Wide Angle Optics. Co-moulded construction. Waterproof. Max. 75 lumens. About LezyneLezyne engineers and produces premium quality bike accessories that meet the same high standards as high-end bicycle components. Lezyne combines a love for cycling and a passion for design, with exquisite design, intelligent engineering and superb functionality. Lezyne was started in 2007 and over the years, they have produced a wide range of high-quality, affordable cycling accessories. Lezyne\\\'s goal was to engineer and produce premium quality accessories that meet the same high standards as high-end bicycle components. Their world famous Lezyne lights and pumps are extremely popular, with the LED lights, floor pumps, hand pumps, CO2 systems, bottle cages, multi-tools, shop tools and tyre repair tools all testimony to the Lezyne ethos of Engineered Design. Lezyne is a cycling accessories industry leader with award winning products worldwide. Lezyne continues to raise the bar in the accessories market with each new range of accessories showcasing the companies innovation in the cycling accessories market. Bike Lights Buying Guide