Product Features: Lentek Super Bark Free 50 feet radius coverage area. Super high power DUAL speakers. Audible and ultrasonic frequency settings. Audible test button. Wall-mount bracket for indoor and outdoor use. Water resistant vinyl cover for additional outdoor protection. Adjustable Bark Selector, 1 bark, 2 barks, 3 barks 4 barks. Lentek Super Bark Free has sensitivity Slide Level. Attachable target dome, targets bark control from far distance Battery Operated, 4 "D" batteries. With One-year warranty.