DetailsBE54030 Features: -Prismatic supra. -Shock-proof. -Compact. -Waterproof. Product Type: -Red Dot Sights/Tactical. Generic Specifications: -Power supply: 3V (one CR2032 or DL2032 or ECR2032). Generic Dimensions: -2.36'' H x 5.32'' W x 2.52'' D. Dimensions: Overall Height - Top to Bottom: -2.36 Inches. Overall Width - Side to Side: -2.52 Inches. Overall Depth - Front to Back: -5.32 Inches. Overall Product Weight: -0.87 Pounds.