For Models: 175NCP, 200 Series, 280 Series, 300 Series, 7000 Series, 1100NC, 1200 Series, 1500 Series, 1600 Series, 1700 Series, 1900 Series, 2300 Series, 7100 Series, and RR Deluxe. Works with all Dogtra remote dog trainers 2 inches tall