*Uses ultrasonic technology to stop barks
*Sensitive microphone isolates and picks up barking up to 50 feet away to stop barking both outdoors.
*Four adjustable ultrasonic volume levels - test, low, medium, and high, with LED battery power level indicator
*Safe and humane method of bark control, suitable for all breeds and sizes of dogs
*Pre-assembled, easy set-up, requires low maintenance, and weatherproof (but avoid exposing to very cold or very hot temperatures from 0°C~45°C, 32°F~113°F). *Attractive and discreet birdhouse design looks great in your home or yard
