Tactical flashlight UltraFire with an external switch and mounting ring for RIS. Tactical flashlight has a super light-emitting LED diode Cree R2-WC thus provides a very intense beam of cold white light (about 500 lm). As a power source use 2 CR123a batteries, however, they are not included. You can not use any rechargeable batteries because of their high voltage which can cause damage to the electronic driver of flashlights. Switching on/off is done by pressing the back switch or external touch switch.