The UFO .300 Crossbow Lighted Nock provides enhanced arrow tracking with its built-in LED illumination system in a vibrant red color.UFO .300 Crossbow Lighted Nock - Red 3-Pack.300 caliber compatibility for crossbow arrowsLighted nock technology for improved arrow visibilityRed LED illumination for easy trackingCompact dimensions: 0.55 x 4.25 x 5.45 inches3-pack quantity for multiple arrowsIdeal for crossbow hunters and target shooters who need reliable arrow tracking in low-light conditions. The lighted feature activates upon release making it easier to follow your shot and locate arrows after impact.