1、10000LM OUTPUT BRIGHTNESS: Underwater flashlight has a maximum output of 10000LM and a lighting range of 300‑500m / 984.3‑1640.4ft. It can be used up to 100m underwater, providing you with super bright underwater white light. 2、EASY OPERATION: 10000LM diving flashlight is easy to operate and has adjustable light levels. Comes with an extra handle for easy carrying above and below the waterline. Can also be used for outdoor activities and camera fill light. 3、ALUMINUM ALLOY: Diving flashlight is made of aluminum alloy with wear resistant coating, IPX8 waterproof, shockproof, scratchproof, 1.5m / 4.9ft drop resistant, ensuring that the dive light works well in the water and outdoors. 4、APPLICABLE RANGE: Waterproof underwater flashlight is suitable for diving, camping, night fishing, caving and sailing. Red and blue light is used for viewing marine life as marine life is not sensitive to red and blue light. 5、LONG SERVICE LIFE: Diving video light lasts > 50,000 hours. Powered by 4 x 18650 batteries. Please choose genuine 18650 batteries carefully, because there are many fake batteries and poor quality 18650 batteries in the market.