Offers ten LEDs and a maximum output of 300 or 400 lumen options; engineered for impressive efficiency and runtime, providing the best beam pattern for optimal light dispersion in even the most challenging conditions\n 80hour max runtime, rest assured that this light will last as long as you need it to\n Rigorously tested to IPX7 Waterproofing standards, built to withstand varying weather conditions\n With seven output modes, including highly disruptive Daytime Flash modes, wideangle optics providing 270° visibility, USBC waterproof charging (cable not included), and a lightweight yet durable comolded design, it's the ultimate choice for every cyclist\n Versatile mounting system attaches to aero or round seatposts\n 300 or 400 lumen options available