The high-performance ProTac 2.0 Rail Mount produces 2000 lumens without sacrificing run time. Powered by the new SL-B50 battery pack that charges inside or outside of the light using a USB-C cord no need to remove from your weapon. – 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: 2000 lumens; 266 m beam; runs 2.5 hours – Low: 250 lumens; 93 m beam; runs 11 hours – Strobe for signaling or disorienting: runs 4.5 hours – IP67-rated; dust-tight and waterproof to 2 meters; 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) – 6.30 in (16.0 cm) – 9.06 oz (257 g) with one (1) SL-B50 battery pack – Available in black – Limited Lifetime Warranty – Product Specifications – High Lumens: 2000 – Run Time on High: 2.50 hours – Run Time on Low: 11.00 hours – Beam Distance: 266 meters – Max Candela: 17700 – Battery Type: Streamlight SL-B50 Protected Li-Ion USB Rechargeable Battery Pack – Battery Quantity: 1 – Length: 6.30 inches (16.00 centimeters) – Weight: 9.06 ounces (256.85 grams) – Color: Black