Exposure Lights TraceR MK4 Rear Light Designed and manufactured in the UK for commuters, road cyclists, and bikepackers who need dependable rear visibility, the Exposure TraceR Mk4 Rear Light delivers remarkable power in a compact package. Weighing just 35 grams, this CNC-machined aluminium light outputs up to 200 lumens in its bespoke DayBright pulse mode, projecting a broad 270-degree beam that ensures you stand out clearly to surrounding traffic at busy junctions as well as from directly behind. With an impressive battery life of up to 40 hours on a single charge, it provides weeks of typical daily commuting or several full days of touring between top-ups, while quick USB-C charging brings the unit back to full power in just 90 minutes. Uncompromising Protection Against harsh Weather Conditions Built to thrive in the worst winter conditions, the tough, hard-anodised body of the TraceR Mk4 boasts an IP67 rating, shielding internal electronics from heavy rain, road spray, and dirt. Its lightweight construction mounts seamlessly to your bike without adding bulk, making it an essential piece of year-round safety equipment for every type of ride. Each unit arrives complete with a dedicated seatpost bracket, a USB-C charge cable, and a quick-start guide, ensuring you are fully equipped and ready to hit the road straight out of the box.