Walther Xenon tactical flashlight with an external switch and mounting ring. Tactical flashlight has a very powerful xenon lamp and provides a very intense beam glare. As a power source are use 2 pieces of CR123 batteries which are included. You can not use any rechargeable batteries because of their high voltage which can cause damage of the bulb. Switching on and off with the turning back of The light or by pressing the rear touch screen or an external switch.