Cateye EL-135 and TL-LD130R Bicycle Headlight and Tail Light Combination Battery-powered 3 white-LED headlight and 3 red-LED tail light with mounts Flashing and constant modes for headlight; 3 flashing modes for tail light Headlight uses 2 AA batteries; tail light uses 2 AAA batteries Headlight run times: 80 hours constant or 320 hours flashing Tail light run time: up to 150 hours