1.5 In. X 1 in. Size and weight about the same as a quarter. White led light 120 hours battery time for a wide 45 degree beam of light. Sliding switch for constant on/off hands free operation or push button for it to be temporarily on for hands free operation. Takes one or two lithium batteries depending on which led color the flashlight is. Weighs .19 Ounces. Includes a key ring.