Options: Choose the flashlight to come with or without a protective case. 5 light modes: Full, medium, low brightness, strobe and SOS functions. Electronics: Get a zoomable flashlight. Telescopic zoom: Stretch the head left and right to zoom to use in different situations. Powered by: 18650 battery or three AAA batteries (not included). Great performance: Eagle eye convex lens with a strong aluminium attack head to protect lens from wear. Zoomable Flashlight & Case Option | Living Social