CatEye Volt 100 USB Headlight. The Cateye Volt 100 USB Headlight is a superb value in a re chargeable light that's perfect for urban riding and commuting. Compact and easy to remove from the handlebar bracket, the Volt 100 features a 100 lumen output and three modes High, Low, and Flashing. The smartly designed bezel provides excellent side visibility while the internal Li ion battery re charges in 3 hours via the included micro USB cable. And with a wide selection of body colors, it's easy to coordinate the Volt 100 headlight with your bike's color scheme.