Osight K Handgun Sight RMSc Footprint Matte Finish Black 6 MOA Red Dot Side Load CR1620 Battery. Compared to its predecessors the Osight K uses an easily replaceable battery so you're always ready to go without waiting for a charge or dealing with the hassle of a charging cover. The Osight K offers 10 brightness settingstwo optimized for night vision and eight for daytime use. The aspherical lens provides zero distortion and parallax-free performance delivering exceptional clarity through the large window for quick target acquisition. The optic is easy to zero in with both windage and elevation adjustments ensuring consistent accuracy. The Osight K also includes a motion sensor that activates with movement and powers down after 3 minutes of inactivity (this feature can be disabled if desired).Powered by a CR1620 battery the Osight K offers up to 63000 hours of runtime at the lowest daytime brightness. When its time to replace the battery the reticle blinks three times every minute to indicate the need for a swap. To replace it simply unscrew the side battery housing and pull out the side battery loader for quick access. Compact and lightweight the Osight K measures just 1.59 inches in length and weighs only 1.02 ounces keeping a low profile. With an IPX6 waterproof rating and a durable 7075 aluminum housing its built to deliver reliability and toughness in any environment. Features: FeaturesFeatures a 6 MOA red dotFeatures 10 brightness settings: 2 for night vision 8 for daytime useActivate the motion sensor function to turn on the optic with any movementEasy to remove battery so you don't have to rely on charging Included Accessories: Osight K (CR1620 battery included);Adjustment Tool;3 M310.5 mm Screws;3 M311.5 mm Screws;3 M49.4 mm Screws;3 M410.5 mm Screws;3 #6-320.433 in Screws;3 #6-400.374 in Screws;3 #6-400.449 in Screws;2 Spare Battery Compartment Screws;Screw Box;Osight Stickers;Cleaning Cloth Specifications for Osight K Handgun Sight RMSc Footprint Matte Finish Black 6 MOA Red Dot Side Load CR1620 Battery: Manufacturer: Osight Color: Black Finish: Anodized Black Reticle: 6 MOA Green Dot Red Dot Additional Features: Side Battery Red Dot Sights-Footprint: RMSc Zoom Range: 1x Case Finish: Anodized Optic Cut: RMSc Cut Handle Color: Black Blade Finish: Anodized Handle Finish: Anodized Features of Osight K Handgun Sight RMSc Footprint Matte Finish Black 6 MOA Red Dot Side Load CR1620 Battery: Motion Sensor Activation Package Contents: Osight K Handgun Sight RMSc Footprint Matte Finish Black 6 MOA Red Dot Side Load CR1620 Battery