Boasting 1600 lumens powered by a rechargeable 18650 battery or two CR123A batteries (not included), the Fenix TK11 TAC Flashlight has some fantastic features. Including an exposed rear switch with silent activation, a patented tactical switch, a rotary switch, an instant strobe, an advanced pulse-frequency transmission system, and a magnetic switch to prevent high-intensity interference. Plus, its high-strength aluminum body is IP68 rated, so it can be submerged up to 6.5 feet for 30 minutes with no damage. Sensational!