For professional underwater using、 this FandyFire XM-L2 LED 1200LM 5 Modes Cool White Diving Flashlight would be a best choice! It features remarkable water resistance which stands both damp condition and water pressure、 and provides light beam in high brightness to delight your visual in water. Also、 it is designed with low power consumption and long working hours、 offering as long as four hours of working time. Great choice for you! Don&acute;t miss it!                                    <p>Features</p>            <ul><li> Remarkable water resistance for professional use underwater</li><li> High strength and strict producing process to stand water pressure to 100 meters depth</li><li> High brightness to offer clear visual range though water</li><li> Top-grade emitter to give out stable、 pure and average light</li><li> Compact and easy to carry with an attached strap</li><li> Low power consumption and long working hours、 fulfilling your needs</li><li> With 5 modes for free adjustment   </li></ul>                                                            <p>Specifications</p>            <TABLE class=ke-zeroborder cellSpacing=0 cellPadding=0 width="100%" border=0><TBODY><TR><TD width=131>Brand</TD><TD width=365>FandyFire</TD></TR><TR><TD width=131>Material</TD><TD width=365>Aluminum</TD></TR><TR><TD width=131>Color</TD><TD width=365>Black</TD></TR><TR><TD width=131>LED Type</TD><TD width=365>XM-L2</TD></TR><TR><TD width=131>Transmitter BIN</TD><TD width=365>U2</TD></TR><TR><TD width=131>Color BIN</TD><TD width=365>Cool White</TD></TR><TR><TD width=131>Number of Launchers</TD><TD width=365>1</TD></TR><TR><TD width=131>Actual Lumens</TD><TD width=365>1200LM</TD></TR><TR><TD width=131>Power Supply</TD><TD width=365>1 x 26650 (Inclusive)</TD></TR><TR><TD width=131>Operating Voltage</TD><TD width=365>7.2~8.4V</TD></TR><TR><TD width=131>Running Time</TD><TD width=365>3~5 Hours</TD></TR><TR><TD width=131>Mode</TD><TD width=365>5 (Hey、 Medium、 Low、 Fast Strobe、 SOS)</TD></TR><TR><TD width=131>Switch Position</TD><TD width=365>Tail</TD></TR><TR><TD width=131>Lens Material</TD><TD width=365>Glass</TD></TR><TR><TD width=131>Reflective Aluminum</TD><TD width=365>Smooth</TD></TR><TR><TD width=131>Working Depth of Water</TD><TD width=365>50m</TD></TR><TR><TD width=131>Dimensions</TD><TD width=365>(6.30 x 1.57 x 1.57)" / (16 x 4 x 4)cm (L x W x H)</TD></TR><TR><TD width=131>Weight</TD><TD width=365>14.11oz / 400g</TD></TR></TBODY></TABLE>                                                            <p>Package Includes</p>            <ul><li>1 x Flashlight</li><li>1 x Rope (about 58cm long)</li><li>1 x 26650 Battery (3500mAh) </li><li>1 x US Plug Charger </li></ul>