• Type of batteries: 8 AA alkaline or same size recharrgeable • Battery life: 3 hours • Maximum depth: 330 feet (100 m) • Diameter/ length: 1.75 in (45 MM)/length 6.1 in (155 mm) • Weight: 5.25 oz (147 g) with batteries • Power on: electromagnetic system • Seal: double O-Ring radial seal • Glass: clear Policabonate • Lumen: 700 LM.