The Holosun HE407C-GR is a pistol reflex sight with valuable features such as backup solar power, shake awake technology, and 50k hours of battery life. The Holosun HE407C-GR has a 2 MOA green dot and is RMR cut. Included T10 L Key CR1632 Battery User Manual Lens Cloth Specs Optical Data Reticle: 2 MOA Dot Light Wavelength: 540nm Reticle Color: Green Parallax Free: Yes Unlimited Eye Relief: Yes Magnification: 1x Multi-Coatings: Yes Electronic Data Power Source: Solar & Battery Battery Type: CR1632 Battery Life (Hours): 50000 Brightness Setting: 10 DL & 2 NV Physical Data Window Size: 0.63x0.91 Dimension (in): 1.78x1.15x1.15 Weight (oz): 1.5 Mechanical Data Housing Material: 7075 T6 Aluminum Surface Finish: Anodized Adjustment per Click: 1 MOA W&E Travel Range: 50 MOA Environmental Data Storage Temperature: -40?~70? Working Temperature: -30?~60? Submersion: IP67 Vibration: 5000G