Product Dimensions 2.5″L x 1.5″W x 4H. Item Weight 15 Ounces. Compatible Devices Firearms with Picatinny rail system. Mounting Type Picatinny Mount. 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. Firearms with Picatinny rail system.