. A compact, and streamlined rear light which is versatile, USB rechargeable, and comes with an ultra-bright COB light LED layout Light Modes. Knog’s Cobber Rear Mid Light comes with a wide range of light modes which can easily be switched between including both flashing and constant modes. The modes included are:Max: 75 lumens 2 hoursMid: 35 lumens 3.5 hoursSteady Pulse: 170 lumens 2.5 hoursFlash: 170 lumens 6.5 hoursRolling Flash: 70 lumens 4.5 hoursSide Flash: 100 lumens 2 hoursDisco Flash: 80 lumens 4.5 hoursEco Flash: 15 lumens 100 hoursUSB Rechargeable. Making it easier than ever to keep the light charged it comes with an internal lithium polymer battery and an integrated USB plug. This allows you to quickly and easily charge the light from any standard USB port. The light is therefore quickly and easily recharged in just 4 hours Mounting. The light comes with a versatile mounting system includes a tool-free, silicone strap which works with most bar types and also includes an aero strap Features. Multiple different light modesIntegrated USB plug for quick and easy charging on the move4 hours full recharge timeInternal lithium polymer batteryTool-less removable silicone straps for bars/seat postsCompatible with bars/seat posts 22-32mm diameter with magnetic mountAero mount also includedEfficient Chip on Board LEDs design to provide maximum brightness100% waterproof and protects against all the elementsWeighs 44gDimensions: 62mm x 33mmBuy Knog Rear Lights from Chain Reaction Cycles, the World’s Largest Online Bike Store.