Powerful 900 lumen LED dive light using CREE XM-L2 T6 LED; 14deg narrow beam angle (10.5deg underwater) for long range and for pointing out sea life; One button operation; Color battery indicator; Safety pressure release valve relieves internal pressure build up caused by damaged battery; Depth tested to 330 feet/100 meters; Can be used with two CR123 lithium batteries; Anodized aluminum head and rubber armored polycarbonate body