The Super Bark Stop Ultrasonic Dog Training Device uses ultrasonic sounds to curb your pup's annoying barking habit. This training device is great for any new dog owner, or one that is trying to teach an old dog new tricks.An outdoor sonic & ultrasonic corrector for Dogs, Super Bark Stop uses same amazing bark stopping technology as the classic edition Bark Stop. The Super Bark Stop features a dual sound selector and an internal directional cone that ensures proper placement of the unit's powerful sonic blast. Choose ultrasonic frequencies heard only by dogs and cats, or lower sound tones actually audible to humans. Both sounds have been shown effective for training dogs to curb barking(Screwdriver required to adjust control settings.) Water proof transparent control cover. LED status indicators visible only from behind or top of unit so dogs or neighbors cannot see the device at night. Superior high power speaker. Audible and ultrasonic frequency settings, with an integrated microphone that is sensitive up to 50'. Features a built in audible test button. Wall-Mountable. CONTROL BREAKDOWN: Volume Sensitivity: Low to High Adjustable Bark Stop Selector: 1 bark, 2 bark, 3 bark, 4 bark. Audible and Ultrasonic Setting Test Button Sensitivity Slide Level. Battery Operated: Requires 4 "D" batteries. Power input: 6 V DC Dimensions: 5" x 7.75" x 4" 90 Day Limited manufacturer's warranty. Comes with a 50 ft AC Adapter.