2.5″L x 1.5″W x 4H. Firearms with Picatinny rail system. Laser Class: Class IIIA. Maximum Output Power: less than 5mw, meets US safety guide. Please note that IR Laser Only Visible under Night Vision Device. Water resistant, shock/recoil proof. Windage and Elevation adjustable. Durable aerospace aluminum, coupled with a water tight design. Easy to control – Comes with wire cable remote control pressure pad switch. Please note that top rail CANNOT be removed. FL3000 Green IR Laser Combo Sight for Night Vision. Comes with IR laser to locate at night. Windage & elevation adjustable. Picatinny accessory rail on the top enables the installation of other optics assessories. Fogproof, waterproof and shockproof.