Tell him in a language that only he can understand.

PetSafe Ultrasonic Remote Pet Trainer takes advantage of your pet's sensitive hearing with a sound that is beyond the range of humans. When the system emits its ultrasonic sound, your pet will understand that you want him to stop whatever he is doing. The Trainer has only two buttons: Positive Tone for reward, and Ultrasonic Tone for correction. It's that simple!

Features:

• Corrects your pet using a startling ultrasonic sound, inaudible to the human ear.
• Effective operating range up to 30 feet
• Positive tone option for rewarding good behavior
• Negative tone option to correct bad behavior
• Indicator light indicates when any button on the Remote Trainer is pressed.
• Ideal for correcting: barking, chewing, jumping up, digging, and much more
• Convenient remote unit requires no collar receiver
• Works indoors or outdoors
• For dogs or cats
• Uses a common 9-volt alkaline battery (not included)
• Lifetime Limited Warranty