Cateye EL-220 and TL-LD270R Bicycle Headlight and Tail Light Combination Battery-powered 5 white-LED headlight and 3 red-LED tail light with mounts Each light offers flashing and constant modes Headlight uses 4 AA batteries; tail light uses 2 N batteries Headlight run time: up to 120 hours Tail light run time: up to 90 hours