1、Magnetron Switch: This submersible flashlight uses push type magnetic control switch, portable operation, 3 gears: strong light, low light, flash. 2、High Efficiency Boost Circuit: High efficiency boost circuit with internal wiring to maximize battery utilization, two 18650 batteries(not included) are required. 3、T40 Wick: Equipped with high power T40 wick, high lighting brightness, strong light long range and low energy consumption. 4、Hard Anodizing Treatment: Hard anodizing surface, wear resistance, no scratch, impact resistance, made of aviation grade aluminum alloy shell, waterproof and durable, diving depth of 30m. 5、Application: Underwater flashlight is professional diving equipment for diving enthusiasts and snorkeling enthusiasts, suitable for various outdoor activities, such as diving, camping, swimming, hiking, hunting, family emergency rescuing, etc. 1 x Diving Light(Battery Not Included) Item Type: Diving FlashlightMaterial: Aluminum AlloyGross Weight: 268g / 9.5ozProduct Size: Approx. 20.5 x 2.8 x 4.9cm / 8.1 x 1.1 x 1.9inSwitch: Push type magnetron switchBattery Type: 2 x 18650(delivered without battery)Gears: 3 gears: strong light, low light, flashZoom Mode: fixed focusWaterproof Grade: IPX8LM: about 1500lmRange: 200-300 metersFeatures: Appearance fine carving technology, wear resistant and non slip, diving depth of 30 meters