Technical Parameters ANSI/FSC Mid Low High OUTPUT 75 LUMENS 10 LUMENS 140 LUMENS RUNTIME 4h 16min 30h 1h 51min DISTANCE 89m INTENSITY 1986cd IMPACT RESISTANCE 1m WATERPROOF IPX-8??underwater 2m Extra FUNCTION ACCESSORIES Key chain and spare o-ring ?? Cree XP-E LED with a lifespan of 50000 hours ?? Uses one 3V CR123A Lithium battery ?? 59.6mm (Length) x 19.7mm (Diameter) ?? 23-gram weight (excluding battery) ?? Digitally regulated output - maintains constant brightness ?? Reverse polarity protection to protect from improper battery installation