High Output CREE LED 640 Lumens (CR123A) Standard Mode and Strobe Mode by Switching the Lamp Bezel Switch Powered by 2 pcs CR123A (Not Included) LED Module withstand Recoil Force Screw Mount for 20mm Rail Special Mount Base for M-Lok / KEYMOD Rail Momentary Pressure Pad Switch Cap Included On / Off Push Button Switch Cap Included Aluminium with Anodized