This two piece lamp set is a great addition for any bicycle. The headlamp has high brightness, high intensity CREE LED, KLINLITE technology, convex lens with magnifying glass for a clean light beam, and 3 lighting modes: High, Low, and Flashing. The rear flashlight which provides a multi LED light beam, Lighting modes: Steady red light and 6 different light flashes. Both units come complete with mounting brackets and included alkaline batteries.