DetailsBE50002 Features: -Sensor reflex. -Multi-coated optics. -Compact and Lightweight. -Shock-proof. Product Type: -Holographic Sights. Generic Specifications: -Power supply: 3V (one CR2032 or DL2032 or ECR2032). Generic Dimensions: -2.09'' H x 3.23'' W x 1.42'' D. Dimensions: Overall Height - Top to Bottom: -2.09 Inches. Overall Width - Side to Side: -3.23 Inches. Overall Depth - Front to Back: -1.42 Inches. Overall Product Weight: -0.23 Pounds.