The 600 lumen PolyTac X is available two ways: The PolyTac X USB is a complete rechargeable system that includes our new 18650 USB battery with an integrated USB charge port. The PolyTac X includes two CR123A lithium batteries. Both feature MULTI-FUEL innovation that allows them to accept Streamlight’s 18650 USB battery or CR123A lithium batteries ensuring you’ll always have a beam when you need it. – Multi-fuel Uses rechargeable 18650 USB battery or two CR123A lithium batteries – Rechargeable system includes 18650 USB lithium ion battery and USB cord – Non-rechargeable system includes two CR123A lithium batteries – TEN-TAP Programming allows the choice of three programs: – 1) high/strobe/low 2) high only 3) low/medium/high – High super-bright light: 600 lumens; 205m beam; runs 2.75 hours (CR123A); runs 3.5 hours (18650 USB); 11485 candela – Medium for bright light and longer run time: 260 lumens; 135m beam; runs 5.5 hours (CR123A); runs 5.75 hours (18650 USB); 4930 candela – Low for extended run time: 35 lumens; 50m beam; runs 34 hours (CR123A); runs 36 hours (18650 USB); 675 candela – Strobe for signaling or disorienting: runs 5.5 hours (CR123A); runs 8 hours (18650 USB) – Removable multi-position pocket clip – High-impact super-tough nylon polymer with Rocky Stipple texture for a sure grip – IPX7; waterproof to 1m for 30 minutes; 3m impact resistance tested – Length: 5.46 (13.87 cm); 4.34 oz. (123 grams) – Limited lifetime warranty – High Lumens: 600 – Run Time on High: 3.50 hours – Run Time on Low: 36.00 hours – Beam Distance: 205 meters – Max Candela: 11485 – Battery Type: 18650 Lithium Ion Battery CR123A Lithium – Battery Quantity: 1 – 2 – Length: 5.46 inches (13.87 centimeters) – Weight: 4.90 ounces (138.91 grams) – Color: Black