. Be safe, be seen with LifeLine’s Direct USB Safety Light Set. The front and rear light can be mounted to your handlebar and seatpost respectively, or should ypu prefer, an optional helmet mount lets you clip the front light to the top of your lid. Each light has four modes to suit your environment. Conveniently, they are both USB rechargeable and water resistant Features: Output: 25 LumenFront Light Dimensions (mm): 52 5x22x20)Rear Light Dimensions (mm): 51x22x20 5)Front Light: High Beam: 2hrs Low Beam: 8hrs Hi-flash: 48hrs Pulse: 10hrsRear Light: High Beam: 2hrs Low Beam: 5hrs Hi-flash: 17hrs Pulse: 9hrsAccessories: USB charging cableBattery: Rechargeable Lithium-Ion polymerMounting clips for straps and bagsLow battery indicatorPrecision lensesWater resistantWeight: 14 5g (front), 50g (rear)Buy LifeLine Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.