Seac Diving Light X5 Led Type of batteries: 8 stilo AA/LR6 1,5 V alkaline batteries. Autonomy: 5 hours,4 of which at maximum power Maximum depth: 200 meters. Diameter/ length:  77 mm/lenght 210 mm Weight: 900 g with batteries On-off switch: relay assisted electro-magnetic system Seal: double O-Ring radial seal. Glass: tempered optical glass, thickness 6 mm and  70 mm