"The MasterVision cap light is the original cap light for hunters, fishing enthusiasts, handymen and other general uses. This sleek, streamlined light clips to the brim of a cap to provide convenient hands-free lighting. Battery Included Yes, Battery Type 2032 Lithium coin cell, Bulb Life hrs. 100,000, Full Load Run Time Hours 58-70 on 3 lights, Includes qty. 1 3 LED cap light, Overall Length in. 3 1/4, Bulb Type LED, Bulbs qty. 3. 3 superbright white Z-Power LED bulbs 1 bulb or 3 bulb light modes Designed to deliver up to 130 hours of light Powered by 2 lithium coin cell batteries included"