Knog Plus Twinpack. A twinpack ideal for any commuter which includes a 40 lumens front light and a 20 lumens rear light Rechargeable. Knog’s Plus Twinpack is extremely convenient with both lights being USB rechargeable saving you the constant effort of having to find and replace your light’s batteries. Instead the lights can quickly and easily be recharged via any standard USB port and both have up to 40 hours of battery life Light Modes. Both lights, included in the twinpack, come with 5 different light modes which can easily be toggled between using the long-push button. The light modes included are:Steady: 2 hoursStrobe: 8.5 hoursPulse: 4.5 hoursFancy Flash: 10 hoursEco Flash: 40 hoursMounting. The lights each come with various mounting options including two types of interchangeable straps for bars and seatposts 22-27mm and 28-32mm+. Additionally each light comes with a magnetic mount which lets you clip the lights to your clothing, rucksack, panniers, etc Features. 40 lumens maximum front light20 lumens maximum rear light5 different light modesIncludes magnetic mounting systemUSB rechargeableWater resistantWearable designEach weigh: 12gDimensions (per light): 14 x 66 x 18mmBuy Knog Lights from Chain Reaction Cycles, the World’s Largest Online Bike Store.