FEATURES-Activated upon the shot & relies upon the conductivity of the shaft-No switches or magnets required-Designed to be used over and over to allow archers to follow the pathc of their arrows-3/pack-OrangePRODUCT SPECIFICATIONS:Dimension 0.50 X 3.70 X 6.80Height 0.5000Width 3.7000Length 6.8000COLOR REDTYPE NOCKSMECHANICAL NFIXED NGRAIN 27DIAMETER FITS ARROWS WITH ID OF .246OTHER FEATURES: SIMPLE PREPERATION OF ARROW SHAFT PRIOR TO INSTALLATION WILL INSURE TROUBLE FREE OPERATION,AIDS IN TUNING,STAYS LIT UP TO 40 HOURS FITS GOLD TIP PRO HUNTER,XT HUNTER,EXPEDITION HUNTER, REDHEAD BLACKOUT X5,X3,X1, VELOCITY PRO,XT,& HUNTER SERIES,TED NUGENT SIGNATURE