If you want to use 2 dogs on the Perimeter Technologies Containment systems, you must purchase an additional collar. Includes Medium Comfort Contacts.
For Use With: PTPCC-100, PTPCC-100D, PTPCC-100DP, PTPCC-200, PTPCC-200D, and PTPCC-200DP. Replacement collar for Perimeter Technologies pet fence systems Pet collar is waterproof and lightweight (2.6 oz) Comfortable, adjustable strap for neck sizes up to 26 inches Soft rubber Comfort Contacts included