Compact, aero seat-post-compatible rear bike light providing up to 150 lumens and six output modes Offers up to 20 hours of runtime and a disruptive Daytime Flash mode Utilizes Wide-Angle Optics lens design to provide 270? of visibility Tested to IPX7 waterproofing standards Integrated USB stick allows convenient cable-free recharging 400 mAh battery capacity Light Modes - Economy (10 lumens), Blast (50 lumens), Pulse (50 lumens), Flash 1 (25 lumens), Day Flash (150 lumens), Femto (5 lumens). KTV LED PRO+ REAR