Retrospec Bicycles Drone-4 Xenon Super Bright White 4 LED Solar Powered Bike Headlight with USB Charging 4 Super White Xenon LEDs, Solar and USB 2.0 Charging Several modes of blinking and flashing with extremely long lasting nickel-hydrogen battery Easy to install and quick to release for safe keeping Affordable quality headlight uses standard type B USB cable Also functions as a bright flashlight for hiking or trekking