4" overall. Clip. Strobe. Tailcap switch. Water resistant. Impact resistant. Pack weight: 2 oz. CREE XBH LED. 0.95" head diameter. High (130 lumens, 4h 15m runtime), Low (20 lumens, 9h 30m runtime), and Momentary On. Memory retention. Crenulated head for self defense. Requires 1 AA battery (included). Aluminum construction. Color: Black. Clam packed.