High efficiency electrocircuit; 4 x CR123 Lithum batteries / 2 x PR18650 Batteries; Output / Runtime: 240 lumen / 260 minutes; Construction: Aircraft grade aluminum CNC machined, hard anodized finish; O-ring sealed; high transparency optical lens; Switch: Tactical button switch; Charge and recharge protected Li-ion battery; Size: Bezel: 52mm; Body: 27mm; Length: 260mm; Weight (including battery): 350g