206928 Model No Quantity 1 piece(s) per pack Color Black Material Aluminum alloy Suitable Gun Type 20mm rail gun Magnification 4 Objective Diameter 3cm Exit Pupil Diameter 3cm Eye Relief 4-6cm Specification Built-in red/green light (5-level adjustable brightness); Powered by 1 x CR2032 battery (included)， waterproof， shock proof Packing List 1 x Gun Aiming Sight Scope 2 x CR2032 batteries 1 x Hex wrench 1 x Cleaning cloth 1 x English user manual