If you have trouble with neighborhood dogs barking incessantly and think you’re slowly being driven insane, don’t despair. This product, called the Ultrasonic Barking Dog Deterrent is sure to make your life more peaceful, effectively silencing inconsiderate mutts and doing so in a completely harmless and humane manner that no one will ever know about.
Disguised to look like a quaint little birdhouse, the Ultrasonic Barking Dog Deterrent kicks into gear whenever it detects a dog’s bark. It then emits a harmless ultrasonic tone that is inaudible to us humans, but startles the dog into silence. The offending pooch soon begins to associate their barking with the unpleasant sound and curbs his or her behavior accordingly.
Equipped with an on/off switch, a test mode and three sensitivity levels of 15 feet, 30 feet and 50 feet, simply hook this ultrasonic RUFF-remedy to a tree branch or attach it to a fence post and await your newfound silence.
Running on a 9-volt battery that will get you up to two months of operation, the Ultrasonic Barking Dog Deterrent will help improve your sleep, restore your sanity and is available now from Hammacher Schlemmer for $69.95.

Source:
Hammacher Schlemmer