Long-Range VHF AntennaIncrease your tracking range with this 22-1/2" flexible, long-range antenna.Compatible Devices: Alpha Astro DC 50 Dog Tracking Collar PRO Trashbreaker TB 10 Dog Device (PRO Trashbreaker) TT 10 Dog Device; WARNING: 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. - cis2:mm5mnJlm -