Built with high-risk and rugged uses in mind, the Nitecore EF1 is a versatile and powerful torch that can quell potential explosions with its certified class D rank.  Feeding on either an 18650 or 2 CR123 batteries, it will effortless slice through darkness at up to 295 yards of throw and also allow you to enjoy more than 60 hours of uninterrupted illumination on the low mode.  The sliding button design also makes for an easy one-hand operation. 

Specifications:

• Type II non-mine explosion-proof
• Ranked as Class D for quelling potential explosions
• Lens is 10mm optical made of epoxy resin
• Possesses ATR/Advanced Temperature Regulation, will change brightness of light based on heat level
• Sliding control power switch will make changing multiple brightness modes fast and simple
• Battery Run Time (18650): High (30 lumens/1hr45min), Mid (320 lumens/3hr), Low (4 lumens/50hr)
• Battery Run Time (CR123): High (830 lumens/1hr30min), Mid (320 lumens/2hr45min), Low (4 lumens/60hr)
• Battery types supported: 1 x 18650 or 2 x CR123
• Distance: 295 yards / 270 meters
• Intensity: 18300 cd
• Length: 5.99 inches (152.2 mm)
• Head Diameter: 1.57 inches (40 mm)
• Weight: 8.82 Oz (250 g) (without battery)
• Waterproof: in accordance to IP54
• Impact resistance: 1.5 meters