Nitesun DIV11 tail magnetic switch diving flashlight, use CREE latest XM-L2(U4) with max output 1050 lumens. This diving flashlight is powered by one 18650 lithium battery with max 1.5 hours run time on high mode. The light use high strength aluminum AL-6061-T6 material with premium Type III military hard -anodized anti-abrasive finish. It is a good choice as your back-up or primary light whether you are a technical or leisure diver.Custom service for mode, package and accessories are available.