Personalize for quick access to your preferred functions: Full Power; Power Save (25%), Strobe (12 sec), SOS, Momentary On/Off Includes portable battery charger, AC Converter and NiMH battery pack Uses either NiMH Rechargeable Battery Pack or (3) C-Cell Alkaline Batteries Beam Distance: 273m (Alkaline) or 258m (Rechargeable) - Note: As product improvements are made, performance may change without notice Lumens: 197 (Alkaline) or 189 (Rechargeable) - Note: As product improvements are made, performance may change without notice Specifications:Length: 11.104 (282.042 mm)Barrel Diameter: 1.199 (30.455 mm)Head Diameter: 1.977 (50.216 mm)Weight with batteries: 18.4 oz. (521.631 g)