The white three-function LED flashlight offers many optimal features. It is focusable through a convex glass lens with a diameter of 25 mm. Using the on/off switch, you can choose between LED white light, IR-940nm light, or UV-395nm light. The LED battery status indicator shows the charge level of the 18650 battery. In UV mode with 395nm, the flashlight is also suitable for weld seam inspection. Note: UV light is also used in forensic science for evidence detection and preservation. It is no longer necessary to remove or replace LED lamp modules from the flashlight to use a different light or color mode or the IR function.