Intelligently designed the user is able to toggle to the rear light mode to choose their desired setting 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 cable for ultimate convenience the rear led back cap design conceals the usb port for recharging the battery this unobtrusive light is designed for he