5.3” overall. Water resistant. Impact resistant. Tactical light for Picatinny rail-equipped long guns. Tap on/Tap off. Remote on/off pad with cord, hook & loop mounting straps and double stick tape. 900 Lumen Cree XPL LED. M1913 Picatinny and Keymod/M-LOK attachments included. Up to 1 hr 25 min runtime. May also be used as a handheld flashlight. Requires (1) CR1/3N battery (included). Aluminum construction. Color: Black. Boxed with hanging tab.