Serfas' USB Rechargeable Combo Light Pack helps keep you seen while riding after daylight. The front has a high, low and two flash modes, and the rear has a steady and flash. Each light has an indicator that lets you know when it's time to charge them, which is done by simply plugging them into your computer's USB port. Both last up to eight hours on a charge and come with integrated mounting brackets.
Run Time: up to 8 hours (headlight/taillight)