Beam candlepower @ 1.5mtr: 250 peak. Continuous burn time: 5 hours. Linear focusing - flood to spot beam. Internal fully sealed switch. Machined aluminium. O-ring sealed for maximum water resistance. Diamond knurled grip. Anodised to prevent corrosion. Lifetime guarantee. Spare bulb inside tail cap. Key ring hole in tail cap. Dimensions: ength - 81mm, Diameter - 13mm. Weight: 24gm including battery. Uses 1 AAA battery (included)