The versatile ACEBEAM TK18 is a full-featured general purpose flashlight for EDC, military and law-enforcement. There is a selection of 3 different LEDs (SAMSUNG LH351D / OSRAM KW CSLNM1.TG / NICHIA 219C). 5 different brightness levels and Strobe are controlled using an integrated and intelligent tail switch. Being powered by an ACEBEAM ARC18650H-310A high drain rechargeable battery, both POWER and ECO mode can be activated. It has ECO mode when running on two CR123A 1600mAh battery. A TIR optimized lens helps soften and focus that impeccable light into a focused beam. Double directional gold plated pocket clip and compact size make it easy to carry around on your pocket. Ergonomic knurling on the canister makes it easy to grip comfortably in the palm of your hand with no strain or cramping even over long periods of time.