The Serfas USM-600 E-Lume 600 Headlights feature a redesigned extruded aluminum housing, new optical lens with excellent side visibility, and improved battery capacity and LED performance. Serfas made not only increased performance a priority but also improved rider visibility, so they designed an all new optical lens and housing with front corner cutouts to allow drastically more light be visible when viewed from either side – and this all without any reduction in quality of forward illumination or beam pattern. Constructed of aluminum the E-Lume housing is strong and lightweight as well as an efficient thermal conductor which effectively reduces heat buildup thus helping maintain temperatures for optimal battery performance and consistent light output. Light output of the Serfas USM-600 E-Lume 600 is sent through a single optical lens creating a powerful beam with strong front illumination and excellent side visibility. Features: All-In-One Design Extruded Aluminum Body Press and Hold Button Lock Daytime Flash Mode Up To 90 Hours Runtime Integrated USB Rechargeable Li-Ion Battery Backlit Button Indicates Charge Status and Low Battery Handlebar Bracket USB Charging Cable Specs: Solid Mode: Overdrive – 600 Lumen / 2.5 hrs High – 300 Lumen / 6 hrs Medium – 150 Lumen / 12.5 hrs Low – 75 Lumen / 22 hrs Flash Mode: Daytime Flash – 600 Lumen / 75 hrs Low Flash – 100 Lumen / 90 hrs Weight : 170g w/ Bracket Battery: 1-Cell Li-Ion Charge Time: 4 hrs To Full At 700mA Using USB Wall Charger Color: Black
