Tigra Sport BikeCharge Dynamo and Bicycle USB Charger Bike-mountable generator uses rider's pedal power to charge almost any device Includes integrated USB 2.0 port, 1000 mAh Battery and F/R LED lights with 3 lighting modes Includes integrated USB 2.0 port, 1000 mAh Battery and F/R LED lights with 3 lighting modes Reaches a full charge in 2.5 hours pedaling at just 12 mph Quiet and virtually drag-free, compatible with any type of USB-chargeable device