The Lezyne Macro Drive features a lightweight & sturdy CNC-machined aluminium body with a Side Visibility design that allows 180 degrees of visibility & increases user safety. Constant Lumens power management drives the LED at a bright 400 lumens, & the Intelligent Power Indicator button allows the user to check the power level at any time. The Side Visibility Cuts allow for 180 degrees of visibility, especially from the side. The Li-ion battery (non-replaceable) is recharged either with a fast, high efficiency, 2 Amp charging with a compatible wall adaptor, or via a Micro USB (Universal Serial Bus) cable for ultimate convenience. The Overdrive Race Mode allows quick switching between Overdrive & Economy, depending on the occasion. The Composite Matrix back cap design conceals the USB (Universal Serial Bus) port for recharging the battery. This unobstrusive light attaches to a wide range of handlebar sizes using a snap-fit Composite Matrix mount that is secured with a multi-position, silicon rubber strap for tool-less installation.