Specifications:

• Uses Cree XP-E R4 LED with a lifespan of 50000 hours
• Uses one 0.9-1.5V AAA (Ni-MH, Alkaline) battery
• 7.2cm (Length) x 1.4cm (Diameter)
• 20-gram weight (excluding batteries)
• OP reflector
• Reverse polarity protection, to protect from improper battery installation
• Made of durable aircraft-grade aluminum
• Premium Type III hard-anodized anti-abrasive finish
• Waterproof to IPX-8 Standard
• Reliable twist switch. Tighten for Firefly (0.04) tightens further for max Output (60 lumens)

Operation: Slightly twist the head tighten to firefly(0.04 lumens), tighten further for max output (60Lumens)