Usage Tips:Features: Built-in Lithium Battery: 2600mAh lithium battery, which can be charged by USB cable at any for time, 84 high-brightness LED beads design, 5000lux, 5500k color temperature.50 Meters Waterproof: the underwater light can be water resistant to 164 feet, allows you to take photos and videos you want on the bottom of the sea, bringing you perfect visual effects.4 Lighting Modes: 4 lighting modes: high, middle, low and SOS models to meet your needs in different environments.: stainless steel and ultra-durable PC materials, even if used in the deep sea, it will not rust.Compatible: Suitable for Hero series, for Pentax SLR cameras and and other SLR cameras or other sports cameras.Specifications: 4 Lighting Modes:High Light Modes: about 2.5 HoursMid Light Modes: about 3.5 HoursLow Light Modes: about 5 HoursSOS Modes: about 9 HoursBattery: Built-in 2600mAh Lithium BatteryLED Beads: 84-leds High-brightness LED BeadsLumen: 5000luxColor Temperature: 5500kWaterproof: 50 Meters/164 ftMaterial: Stainless Steel+PCSize: Approx. 6.6x11.5 for cm/2.59x4.5 inchPackage Includes: 1 Piece 50M Waterproof Diving Light1 Piece Mount Adapter1 Piece Thumbscrewnote: Other demo accessories are not included.Please allow 1-3mm error due to manual measurement. please make sure you do not mind before ordering.Due to the difference between different monitors, the picture may not reflect the actual color of the item,please make sure you do not mind before ordering, Thank you!