Description The high-performance ProTac® 2.0 Rail Mount produces 2,000 lumens without sacrificing run time. Powered by the new SL-B50® battery pack that charges using a USB-C cord outside of the light or inside – no need to remove from your weapon. Features Uses one (1) Streamlight SL-B50® protected Li-Ion USB-rechargeable battery pack (included) Features TEN-TAP® programming - Choice of three user selectable programs:1) high/strobe 2) high only 3) low/high High: 2,000 lumens; 266m beam; runs 2.5 hours 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 6000 series machined aircraft aluminum with Type II MIL-Spec anodized finish Mounts directly to guns with MIL-STD-1913 (Picatinny) rails Available as "light only" or "system" (system includes remote pressure switch, remote retaining clips, double-sided tape, zip ties, and M-LOK® mount) 6.30 in (16.0 cm) 9.06 oz (257g) with one (1) SL-B50® battery pack Available in black Limited lifetime warranty Specifications High Lumens: 2,000Run Time on High: 2.50 hoursRun Time on Low: 11.00 hoursBeam Distance: 266 metersMax Candela: 17,700Battery Type: Streamlight SL-B50 Protected Li-Ion USB Rechargeable Battery PackBattery Quantity: 1Length: 6.30 inches (16.00 centimeters)Weight: 9.06 ounces (256.85 grams)Colors: Black Documentation Data SheetFact SheetInfo Sheet with Part NumbersProduct Instructions