Requires 19V battery (not included) * Remote control "paw" for use with Pet Chime wireless doorbell * Pet Paw can sit on floor or be wall-mounted * Pets can be trained to activate chime for going in or out Extra Paw for the Lentek Pet Chime Dog Door Bell. Uses one 9-volt battery. Place Paw in a location protected from weather. Extra paws allow you to place one outside or at every door.