PetSafe Indoor Ultrasonic Bark Control for Dogs of All Sizes, Up to 25 ft. Range, Anti-Bark

Discourages nuisance barking; no bark collar needed Tabletop or handheld use Works on all dogs within hearing range; for dogs of any size Add extra units for coverage in multiple rooms Range up to 25 feet Water resistant Low battery indicator Measures 5 in W x 3 in H x 2 1/4 in D