3 Lighting Modes & 90 Rotation The Diving head lamp has 3 switch modes: High Medium Strobe. Strobe mode could be used for emergency when youre in danger during Diving. Additionally , it also support rotated up & down 90 degree rotation. Power SourceThis Diving Headlight powered by 1*18650 lithium battery , comes with a battery Charger. Note: The cover needs to be tightened when installing the battery , otherwise it will not be bright. IPX8 Waterproof RatedWater resistant design , it could be used normally underwater 50100m. Which is suitable for scuba Diving , wreck Diving , underwater fishing , salvage , & underwater photography. Also it can be used for camping , swimming , hiking , trekking , hunting , fishing , etc. Great Quality & DurableToughened glass Lens & 6061 aluminum alloy case for extreme conditions. Seawater corrosion resistance , scratch resistance , Anti drop & durable. Comfortable & adjustable headb& suitable for most head size.