The Seeker RDS is a compact and modular open reflex sight for pistols. 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 hours 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. Includes: 1x Seeker Red Dot Sight, 1x CR2025 Battery, 2x Flat Head Torx T10 M3 x 7.5 mm (PreCoated 3mm), 2x Flat Head Torx T10 632 x 7.5 mm (PreCoated 3mm), 1x Tool T10 and PH001x Loctite1x Battery Separator