CVLIFE Tactical Red Dot Laser Sight with 20mm Standard Weaver Rail for Pistol Gun Rifle Power of the laser: 2mW; Class of the laser: Class IIIA; Laser type: red; Wavelength: 625-660nm ; Size: 2.4" x 1.15" x 0.85" or 60mm x 29mm x 23mm The red dot laser sight is anti vibration, fog-proof and shock-resistant. Fits standard 20mm weaver and Picatinny rails This laser sight adjustment for windage and elevation illuminated cross-hairs for day & night shooting Built-in weaver style base mount , mounts securely onto standard pistol rail; Non-reflective Matte Black finish Cross-hair being used instead of the traditional front sight and notch base the aiming speed, accuracy and percentage of hits are greatly increased