Incorporates innovative Alert technology, which intelligently adjusts its outputs to signal deceleration and stoppingPowerful illumination with a maximum output of 150 lumens and up to 20-hour runtime in Femto mode6 output modes, including Daytime Flash ensuring maximum visibility during daylight hoursWide-Angle Optics lens design to provide 270° of visibility and is rigorously tested to IPX7 Waterproofing standardsVersatile mounting system attaches to aero or round seatposts, and an integrated USB stick allows convenient cable-free rechargingBlack6RearSeatpostUSB150UPC/EAN/GTIN: 4710582551796