Multi-Fuel – Uses rechargeable Streamlight SL-B26® protected Li-Ion USB rechargeable battery pack or two CR123A lithium batteries Rechargeable system includes SL-B26 battery Non-rechargeable system includes two CR123A lithium batteries TEN-TAP® Programming - Choice of three user selectable programs: 1) high/strobe/low 2) high only 3) low/medium/high Output: High for maximum illumination: 1,000 lumens; 330m beam; runs 1.25 hours (CR123A batteries); runs 1.5 hours (SL-B26 battery pack) Medium for bright light and longer run time: 400 lumens; 200m beam; runs 3 hours (CR123A batteries); runs 3.5 hours (SL-B26 battery pack) Low for extended run time: 65 lumens; 80m beam; runs 20 hours (CR123A batteries); runs 23 hours (SL-B26 battery pack) Strobe for signaling or disorienting: runs 2.5 hours (CR123A batteries); runs 3.25 hours (SL-B26 battery pack) Durable, anodized aluminum construction; Unbreakable pocket clip IP68-rated; dust tight and waterproof to 2m; All openings O-ring sealed 2m impact resistance tested Anti-roll head 5.43 in (13.8 cm); 5.7 oz (162g) with CR123 batteries; 6.2 oz (176g) with SL-B26 battery pack RoHS compliant