Introducing the Hexion Tech Seeker Red Dot Sight. The Seeker RDS is a compact and modular open reflex sight for pistols. What makes this optic modular are three optional shrouds that can be purchased separately. There are three sizes of shrouds a small, medium, and large. The small and medium shrouds act as a hood that can help make viewing the reticle(s) more easily when operating in bright lighting conditions. The large shroud includes a rear piece of glass to partially encapsulate the Seeker to help protect the optic against the elements. In total, there are 8 brightness settings which can be easily adjusted with the up and down buttons. To switch reticles, simply hold down either button for about 2 seconds. To manually turn off the optic completely press both buttons simultaneously. With a RMR footprint the Seeker was designed to fit on as many handgun platforms as possible. Featuring 3 reticles and 4 modes you can cycle through, the Seeker has a 3MOA red dot, a 40MOA circle, and a 50MOA cross reticle. The fourth mode you can use utilizes all 3 reticles on simultaneously. Using a single CR2025 battery the Seeker is rated to last up to 30k hours. When two or more reticles are turned on at the same time, the battery life can support 5-6k hours of runtime. The battery is also loaded from the top to avoid the need for removing the optic to install a new battery, retaining user's zero. Additionally, the Seeker has a battery saving function where the reticle will automatically shut off after two minutes of no movement has been detected. Likewise, the motion sensor also allows for automatically activating the red dot, turning it back on when it senses movement. Not only is the Seeker a highly impact resistance optic, it uses a micro-LED which is highly efficient and ensures years of maintenance-free use. Specifications for Hexion Tech Seeker 1x Red Dot Sight: Manufacturer: Hexion Tech Color: Black Magnification: 1 x Objective Lens Diameter: 17.85 - 26 mm Reticle: 3 MOA Illumination Type: LED Illumination Color: Red Eye Relief: Unlimited Adjustment Click Value: 1 MOA Battery Type: CR2025 Battery Life: 30000 hours Length: 1.93 in Width: 1.28 in Height: 1.03 in Weight: 1.24 oz Red Dot Sights-Footprint: RMR Lens Type: Glass Features of Hexion Tech Seeker 1x Red Dot Sight Modular Red Dot Sight Optional Shrouds (S/M/L)COMING SOON RMR Footprint / Large FOV 4 Reticles (Dot/Circle/Cross/Combo) Motion sensor for auto activation and shut off Battery life lasts up to 30,000 hours Limited Lifetime Warranty Package Contents: Hexion Tech Seeker 1x Red Dot Sight x1 CR2025 Battery x2 Flat Head Torx T10 M3 x 7.5 mm (Pre-Coated 3mm) x2 Flat Head Torx T10 6-32 x 7.5 mm (Pre-Coated 3mm) x1 Tool T10 and PH00 x1 Loctite x1 Battery Separator