The Nockturnal Shift Universal Strobing Red/Green Lighted Nock 3pk NT-832 combines the best of both worlds with its alternating red and green LED illumination. These lighted nocks feature a patented, string-activated, piston-driven contact linear switch that triggers the strobing effect upon release, making it easy to track your arrow's flight path. The external on/off switch allows for quick deactivation, while the impact-resistant polycarbonate construction ensures durability. Compatible with X, H, S, and GT arrows, these nocks provide over 20 hours of battery life, making them perfect for low-light hunting and target shooting. Nockturnal Shift Universal Strobing Red/Green Lighted Nock 3pk NT-832