Check the listing for details. Lumenok GT Nock (3-Pack), Green. Color: Green, Condition: New. Listed at 51.08 USD. The Lumenok is activated upon the shot and relies upon the conductivity of the shaft. NO switches or magnets required. The Lumenok is made using a Signature nock from Bohning. The Lumenok is designed to be used over and over to allow archers to follow the path of their arrows. Each Lumenok has easily replaceable batteries.The Lumenok is a Green lighted arrow nock used for shot placement recognition & arrow retrieval.Lumenok Signature (GT1) lighted arrow nock fits .246" ID carbon and aluminum shaftsEach Lumenok is equipped with a replaceable battery (Lumenok part # RB).Replaceable Battery - The patented Polymeric battery holder allows for battery replacement and protection against failure due to hard impacts!Fits .246" ID shaftsShot placement recognition and arrow retrievalEasily replaceable battery