DOGTRA ARC Handsfree PlusNew ARC HANDSFREE PLUS expandable training system! Now featuring the expandable HANDSFREE SQUARE, allowing users to add up to 14 SQUARES delivering a diverse range. New ARC HANDSFREE PLUS expandable training system! Now featuring the expandable HANDSFREE SQUARE, allowing users to add up to 14 SQUARES allowing you to control your dog remotely. Expandable up to 2 dogs, the ARC HANDSFREE PLUS gives you the option to easily pair a second receiver and