6000 Series machined aircraft aluminum with Type II MIL-Spec anodized finish; Uses one Streamlight SL-B50 protected Li-Ion USB-rechargeable battery pack (included); Features TEN-TAP programming - choice of 3 user-selectable programs (high/strobe, high only, low/high); Program High: 2,000 lumens; 266m beam; runs 2.5 hours; Program Low: 250 lumens; 93m beam; runs 11 hours; Strobe for signaling or disorienting: runs 4.5 hours; IP67-rated, dust-tight and waterproof to 1 meter for 30 minutes (IPX4-rated when remote switch is plugged in); 2-meter impact resistance tested; Mounts directly to guns with MIL-STD-1913 (Picatinny) rails; Includes remote pressure switch, remote retaining clips, double-sided tape, zip ties, and M-LOK mount