Bark Stop has a special sound selector that lets you choose two different frequencies: Ultrasonic frequencies and Sonic Frequency. In Ultrasonic frequency it can only be heard by dogs not humans. Bark Stop uses an old age principle called "Negative Reinforcement" by using sound to help train dogs. Help stop that annoying bark.

• Audible and ultrasonic frequency settings
• Audible test button
• Wall-mount
• Improved Feature: Water Resistant for Outdoor use. No cover required.
• Improved Feature: "Bark pick-up" feature responds to barks up to 35 ft from unit. Microphone will hear the dogs bark and activate the two high powered speakers.
• 50 ft. power extension cord included
• New Feature LED status indicators can only be seen from behind or on top of product, to prevent dog or neighbor from seeing product at night.
• No rain cover is required. Bark Stop is ok for use outdoors. All seals are reinforced and all buttons and switches are within water tight compartment.