Item No.: U11 Model: Diving Light LED: CREE XML U2(white light) Lumens: 900 Lumens LED Color temperature: 4500-5000k. Modes: High,Low,Strobe Burn Time: 4 hrs (high), 7.8 hrs (Low) Waterproof: 100 meters Material: Aeronautical aluminum Color: Black/Blue Treatment: Hard-anodizing type III Lens: 4mm clear PC Battery: 1x 18650 Li-ion battery Sizes: 235(L)x32(body dia.)x60(head dia.)mm Weight: 243 g (w/o battery) Switch: Tail switch Operation: Repeated to switch ON/OFF within one second to cycle through 3 modes.