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