Designed to assist you with obedience
training and behavior modification of your dog
or cat by taking advantage of the sensitive
hearing. The ultrsonic frequency is inaudible
to most humans. The negative tone button
activates the ultrasound which startles your pet more than yelling or a firm voice command. There is also a positive tone for rewarding good behavior. The transmitter has a 30-foot
range and uses a 9-volt alkaline battery (not included). Manual included. Non-returnable 3 days after receipt.