durable aluminum housing rubberized switch non-slip grip 1 x 1W High Power LED luminosity with 100 lumens Slim and portable design available in black ideal for work and home powered by 3 x LR3 Digi Alkaline battery (included)Technical dataDiameter (mm)25.0Length (mm) 95.0Weight (g)41.7Batteries 3 x LR3 Digi AlKalineHousing AluminumLuminosity100 Lumens