INCREASED SIDE VISIBILITY - Cutouts in the side of the Plug design result in improved side visibility. Given the fact that 78% of accidents happens with cars not seeing bikes at intersections, any additional visibility from the side can only be a good thing. USB RECHARGEABLE - As with all of Knog’s bike lights the Plug is 100% rechargeable. Recharging is achieved via use of the micro USB port conveniently located behind the large rear button. Using a micro USB cable (not supplied) you can then simply recharge off any USB port. EASY ONE BUTTON OPERATION - A large, soft touch button ensures easy operation of the Plug. The Plug’s oversize button allows the user to turn the light on and off with ease, even when wearing gloves. LOW BATTERY INDICATOR - Don’t be caught out with an uncharged bike light again. With the Plug’s clever side visibility window doubling up as low battery indicator, you’ll know when exactly when your light needs recharging. Plug comes with two silicone bands for securing it to handlebars (22-27mm & 27-32mm)