Dimensions: 104mm x 42mm dia. Including: 1 each flashlight, ring mount, and remote pressure switch Battery: 3x CR123A's (not included)  ***Do not use 3.7V or higher battery to avoid malfunction.*** Nylon ring mountMax 800 lumen super-bright LEDCNC aluminum alloy housingAmbidextrous push button On / Off switchTactical remote On / Off pressure switchPlease note these are on order with Modify