4″ overall. Water resistant. Weapon mountable. Weight: 3.9oz. Rail-attached tactical light for M1913 Picatinny, Keymod and M-LOK rail-equipped long guns. Remote On/Off pad with cord, hook & loop mounting straps, and doublestick tape. CREE XPL LED 500 lumen white light. Rail attachments included. Battery life: 1h 10m. May be used as a handheld flashlight. Aluminum construction. Color: Black. Boxed with hanging tab.