New From Petsafe, This Decorative Electronic Birdhouse Is Really A Ultrasonic Bark Control System To Control Nuisance Barking! Does Your Dog Bark Too Much More Important, Does Your Neighbor's Dog Bark Too Much? Now There Is A Solution To Excessive Barking - Even If It's Coming From Someone Else's Dog! Excessive Barking Can Cause A Real Strain On Your Relationship. The Ultrasonic Outdoor Bark Control Unit Controls Outdoor Barking And No Collar Is Needed! Designed To Hang In A Tree, On A Fence Post, Or Anywhere Outside, The Petsafe Outdoor Ultrasonic Bark Control Is Powered By A 9 Volt Battery And Will Train Your Dog, Or Your Neighbor's Dog Not To Bark. Safe And Effective For All Breeds And Sizes Of Dogs. Settings Include 4 Levels Of Operation. The Petsafe Outdoor Ultrasonic Bark Control Is Effective Up To 50 Feet Away! The Offending Dog Hears A Safe High Pitch Ultrasonic Sound (inaudible To Humans) When He Barks, Since It Is Unpleasant To The Dog, The Dog Learns To Stop Barking! Type: Bark Control