CatEye Econom and Reflex Auto Bicycle Headlight and Rear Safety Light Combo Kit HL-EL340/TL-LD570-R Head Light: 3 different light modes with runtime of Hight(7 hr),Low(20 hr),Flashing(80hr) Tail Light- Constant + 4 flashing mode: 30hours of runtime(Constant)/100+ hours of runtime(Flashing) Tail Light : Autoor manual ON/OFF Tail Light :Autoor manual ON/OFF Battery type: Head Light: AA x 2, Tail Light:AAA x 2