A next-level rear light featuring cateye’s signature kinetic brake technology with a built-in acceleration sensor that switches the light automatically to high constant mode when decelerating just like a car’s brake light. Designed for all-weather reliability with ipx7 waterproofing and vibration resistance, this compact unit offers 360-degree visibility and long battery life from standard aaa batteries.Key features:built-in acceleration sensor triggers high constant brake light modewaterproof design ipx7 built for all-weather useup to 180 hours of battery life on 2x aaa batteries360-degree visibility with 5 high-efficiency ledsthree modes: two flashing and one constant, with easy one-button switchingmode memory recalls last used settingflextight sp-11 bracket for quick, tool-free mounting on seatposts and seatstayscompatible with clip c-2 for attachment to bags or pocketslightweight at just 49g including batteriesruntime:low: approx. 70 Hoursflashing: approx. 160 Hoursrapid: approx. 140 Hours note: frequent use of brake kinetic mode will reduce battery life technologies:kinetic brake mode for automatic high beam on decelerationopticube lens tech for maximum brightness and visibilityside visibility for enhanced safetyflextight versatile mounting systemspecification:waterproof rating: ipx7power: 2x aaa batteries included weight: 49g with batteries mounting: flextight bracket and clip compatible