BeamQ Dot Sight Rifle Scope 1 x 32 Holographic Rail Mount 20mm Red Dot Solid metal construction,durable all metal housing with dual-layer coated lens and easy to clean. Light-weight water-proof,fog-proof and shock-proof enhance performance in all weather conditions. Zooming 1X magnification, 32mm objective diameter. Powered by 4pcs 3v lr936 button cell, the batteries may be removed by shipping company. Windage and elevation adjustable,built-in picatinny mount base for easy sight remounting.