The Ultrasonic Barking Dog Deterrent.
Disguised as a birdhouse, this patented device quickly and humanely restores peace and quiet for those vexed by a dog's barking. When a dog barks within range of the birdhouse, it emits a harmless ultrasonic tone, inaudible to humans, that startles the animal into silence. The dog quickly associates its bark with the unpleasant sound, which conditions him to curb this undesirable behavior. An on/off switch with three sensitivity levels (15', 30', 50') lets you control the unit's effective range.
It can be hung from a tree limb, mounted to a fence post, or hung on a wall less than 5' off the ground.
Requires one 9-volt battery. For outdoor use only.
6-1/2" H x 5-3/4" W x 5-1/4" D. (1-1/4 lbs.)