The patented, string-activated, piston-driven contact linear switch triggers the nock to illuminate immediately when the string is released and can be quickly turned off with the newly integrated external switch.

• Super strong clear polycarbonate construction
• Waterproof and shockproof
• Fits X, H, S, and GT arrows
  • H (white bushing) = Fits smaller diameter carbon .233 ID shafts
  • GT (black bushing) = Fits smaller diameter carbon .246 ID shafts
  • S (gray bushing) = Fits standard carbon .244 ID shafts
  • X (no bushing) = Fits smaller diameter carbon .204 ID shafts
• Each nock in this package weighs approximately 25 grains
• Delivers more than 20 hours of lithium-powered battery life