Knog Cobber Rear Big Light. A large light with a wide beam with up to 270 lumens of light output with a super convenient design that is perfect for any urban cyclists. The light is USB rechargeable with an integrated USB plug that directly plugs into any standard USB port for quick and easy charging on the move. Also easy to mount the light comes with both aero and standard mounting straps that offer quick release and tool-free mounting Light Modes. Knog’s Cobber Rear Big Light comes with 8 different light modes which allows you to find the best possible lighting for your current lighting environment and includes both flashing and constant modes Max: 160 lumens – 2 hoursMid: 60 lumens – 3.5 hoursSteady Pulse: 270 lumens – 2.50 hoursFlash: 270 lumens – 6.5 hoursRolling Flash: 110 lumens – 5.5 hoursSide Flash: 170 lumens – 2 hoursDisco Flash: 140 lumens – 5 hoursEco Flash: 15 lumens – 100 hoursFeatures. 8 different light modesIntegrated USB plug for cable free chargingIn-built rechargeable lithium polymer battery5.5 hours full recharge timeTool-less removable silicone straps for bar/seat posts 22-32mm diameter with magnetic mountAero Mount also includedEfficient Chip on Board LEDs designed to provide maximum brightness100% waterproof against all elementsWeighs 58gDimensions: 92mm x 33mmBuy Knog Front Lights from Chain Reaction Cycles, the World’s Largest Online Bike Store.