Monstrum Ruckus Prismatic Red Dot Sight w/ Shake Awake 5x30mm BDC Reticle Black. Comes with Shake Awake motion sensing illuminated reticle. Activate the illumination to turn on shake awake mode - the dot will automatically shut off after ten minutes and re-activate instantly upon movement.Prism scope reticles are etched in glass produces less distortion than red dots and are easier for the eye to focus on especially for shooters with astigmatism. All Monstrum products are backed by a full lifetime warranty Specifications for Monstrum Ruckus 5x30mm Prismatic Red Dot Sight w/ Shake Awake: Manufacturer: Monstrum Color: Black Magnification: 5 x Objective Lens Diameter: 30 mm Reticle: BDC Reticle Illumination Color: Red Battery Type: Lithium Metal CR2032 Weight: 15 oz Red Dot Sights-Footprint: Not Applicable Package Contents: Monstrum Ruckus 5x30mm Prismatic Red Dot Sight w/ Shake Awake Monstrum PK5XB-BDC: Ruckus Prismatic Red Dot Sight w/ Shake Awake 5x30mm BDC Reticle Black