PetSafe® Stubborn Dog Add-A-Dog® Extra Receiver Collar

For Stubborn or Hard to Train Dogs – 4 adjustable levels of static stimulation; highest intensity availableTone and Vibration Warning – Ideal for training hearing-impaired dogsWaterproof Receiver Collar – With low battery indicatorAdd Unlimited Pets to Your System – Keep as many pets as you need safely in your garden with this add-a-dog receiver collar. Compatible with all PetSafe In-Ground Systems except YardMax® and UltraSmart®.