This dive light is so small that they as a backup lamp fits easily into your pocket. Yet it is so bright that it is also useful as main lamp. She has a very bright spot and is perfectly suitable hineinzuleuchten underwater caves and Riffspalten. Because actually the largest part of the total light glare are bundles in Spot reduced by particles in the water to a minimum. Logically, it is not to be used as a video or photo of people due to their inhomogeneous light image with a hard-earned spot. The light color is a bit cool and minimal bluish. The lamp is slim, short and easy. The magnetic slide switch is easy to use. This allows the diving lamp easily switched and dimmed continuously. When storing or transporting but it is recommended to the cap to release a fourth rotation, so you do not accidentally turning on the lamp and thus other items "ankokelt". Supplied with 2 batteries are included with PCB protection circuit. Misleading, however, that in addition to the photo of the item description 4 batteries were listed and are later awarded the "small print" included only 2 batteries. The lamp is powered by a 18650 battery. The 2 supplied batteries with PCB protection sufficient for 2x one hour each full light under water. On land, the lamp has a range of about 200m. There they would but in continuous operation certainly a little too hot. Between lamp head and battery compartment and in the end cap are each 2 sealing rings. Tip: Because the rings are factory only minimally lubricated, I recommend the sealing rings and their seats with silicone grease zusättzlich and repeated to pocket thin. The lamp is fully in order. But the item description in the online offer could be a bit more precise and unambiguous.