T.O.P. Compact Convertible, 1 Watt LED, Black Al. Body, Box Aerospace Aluminum Body, Hard Anodized Converts from 6.06 in. Length Powered by 2 - AA Batteries to Compact 3.50 in. Length Powered by 1 - CR124A Battery High Intensity 1 Watt Luxeon LED with 35 Lumen Output Advanced Circuitry Guarantees the Brightest 1 Watt LED Possible. Compare to Others - See the Difference 90 Minutes Battery Run Time