PetSafe Ultrasonic Dog Bark Training Collar for Large and Small Dogs

Gentle Bark Control – When your dog barks, the collar emits a high-pitched ultrasonic sound that is annoying to your dog but is silent to most humans.Fits Small to Large Dogs – The collar fits dogs over 8 pounds and neck sizes up to 28 inches.Fits Other Collars – A collar is included, but if your tail-wagger already has a favorite collar, the bark control unit will fit on other collars up to 3/4 inches wide.Fits Other Collars – A collar is included, but if your tail-wagger already has a favorite collar, the bark control unit will fit on other collars up to 3/4 inches wide; fits dogs over 8 pounds and neck sizes up to 28 inches.Battery Life – Two replaceable 3-Volt lithium batteries are included; collar has a low-battery indicator and an on/off switch to help preserve battery life.”No Bark Guarantee” – If this product is not meeting your needs, please contact PetSafe so we can help you find a different solution for your dog.