Long-Range VHF AntennaIncrease your tracking range with this 22-1/2 flexible, long-range antenna.Compatible Devices:Alpha(TM)AstroA(R)DC(TM) 50 Dog Tracking CollarPRO Trashbreaker(TM)TB 10 Dog Device (PRO Trashbreaker)TT(TM) 10 Dog DeviceWARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.