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 Hours Mid Light Modes: about 3.5 Hours Low Light Modes: about 5 Hours SOS Modes: about 9 Hours Battery: Built-in 2600mAh Lithium Battery LED Beads: 84-leds High-brightness LED Beads Lumen: 5000lux Color Temperature: 5500k Waterproof: 50 Meters/164 ft Material: Stainless Steel+PC Size: Approx. 6.6x11.5 for cm/2.59x4.5 inch Package Includes: 1 Piece 50M Waterproof Diving Light 1 Piece Mount Adapter 1 Piece Thumbscrew note: 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!