The Lezyne KTV Drive Pro+ Rear is a compact, aero seatpost-compatible rear bike light providing up to 150 lumens and six output modes. It offers up to 20 hours of max runtime and a highly disruptive Daytime Flash mode. +The light utilizes our Wide-Angle Optics lens design to provide 270 of visibility, durable, rigorously tested to IPX7 Waterproofing standards, and an integrated USB stick allows convenient cable-free recharging.