The Lumenok GT Lighted Arrow Nock is activated upon the shot to allow archers to follow the path of their arrow. This model Lumenok contains no moving parts, only a battery, a wire and a light source arranged in an open circuit. The material in the arrow shaft completes the circuit. No magnets required. Always know where your arrow goes with the Lumenok. This Lumenok is made using a GT Nock from Gold Tip.