Item No.: U21 Model: Diving light LED: CREE XML U2 Lumens: 1000 Lumens (led dive lamp) Modes: High,Low,Strobe BurnTime: 2 hrs (high), 8.2 hrs (Low) Waterproof: 120 meters Material: Aeronautical aluminum Color:Black/Blue Treatment: Hard-anodizing type III Lens: 6mm clear PC Battery: 2x 18650 Li-ion battery Sizes: 235(L)x24.5(body dia.)x60(head dia.)mm Weight: 395 g (w/o battery) Switch: Tail switch Operation: Repeated to switch ON/OFF within one second to cycle through 3 modes.