NcStar TACTICAL FLASHLIGHT 3W LED With RING (ATFLB) Specifications All Aluminum construction; 3 Watt Ultra-Bright LED 65 Lumens peak output Momentary and Constant on/off cap switch (compatible with AFWS pressure switch) Includes Weaver Style Ring Mount Uses 2 CR123A Lithium Type Batteries (included) Dimensions (INCHES) 4.64Lx1Wx1.12H Weight: 5.7oz. with batteries Manufacturer: NcStar Model Number: ATFLB SKU: NC_ATFLB more info