Cutting-edge rear light offering ten LEDs and a maximum output of 400 lumensOffering 7 different output modes, including the highly disruptive Daytime Flash that grabs attention and the wide-angle optics providing an impressive 270° visibility rangeLightweight yet durable waterproof construction, rigorously tested to IPX7 Waterproofing standardsSupport 2.0 and 3.0 fast charging and up to 80 hours runtimeCompatible with aero and standard round seatpostsBlack7RearSeatpostUSC-C400UPC/EAN/GTIN: 4710582551475