Lezyne Macro Drive Headlight Black, One Size Lezyne Macro Drive features a lightweight and sturdy CNC-machined aluminum body with a Side Visibility design that allows 180 degrees of visibility Constant Lumens power management drives the LED at a bright 400 lm and the Power Indicator button allows the user to check the power level at any time 181 degrees of visibility The fast high eciency charging via a Micro USB cable Overdrive Race Mode allows quick switching between high and low beam