The Plug Rear Bike Light harkens back to Knog’s roots using overmolded soft touch TPU in three fun colours. Kicking out 10 lumens this light is packed with features including a low battery indicator rear domed lens and like all Knog bike lights it's USB rechargeable. Designed to work with all genres of bicycles from commuters to road bikes the Plug comes with two silicone bands for securing it to seat posts - including aero posts. Features: Increased Side Visibility - The specially designed domed rear lens increases side visibility ensuring you'll be better seen. Easy One Button Operation - The Plug’s oversize button allows the user to turn the light on and off with ease even when wearing gloves Low Battery Indicator - A conveniently placed low battery indicator within the lens will let you know when your light needs recharging USB Rechargeable - Recharge using the micro USB port conveniently located behind the large rear button micro USB cable not supplied Specification: Bulb Type - LED Light Output Max - 10 lumen Run Time - Max Steady: 3 hours Eco-Flash: 100+ hours Charge Time - 2.5 hours Waterproof - Yes IP66 Rating Light Modes - 5 Fits Handle Bars - 22 - 32mm+ diameter plus head tubes to 7.9 inches Rechargable - Yes micro USB port Dimensions - H: 40 mm x W: 33 mm x L: 50 mm Weight - 30 grams Low Battery Indicator - Yes Strap Material - Medical Grade Silicone Operating Temperature - -20 to 50 °C / -4 to 122 °F Optimum Charging Temperature - 20 to 22 °C / 68 to 72 °F Room Temperature