500 Lumen output certified to the FL-1 Standard Compatible with optional GoPro mount adapter to setup just about anywhere. It is the only light in its class with an accurate 4 level battery charge status indicator so you know if you have the juice to get home Custom engineered reflector optimizes the light to provide the most efficient and effective distribution of light for cycling. Amber Side lighting for a full 180 degrees of safe visibility Innovative one-touch traffic mode toggles between high and medium output only Designed to be mounted on your handlebar or helmet (Tool-free system) Lightweight Aluminum body with integrated heat sink fins MicroUSB Rechargeable (Fully charges in 5.5 hours) Low battery warning and auto shut-off to prevent damage Multiple power settings. High 1:30 / 500 Med 3:00 / 225 Low 6:00 / 115 Pulse 12:00 / 115 System weight: 121 grams Designed and Assembled in California. Backed by Light & Motion's 2 Year Warranty.