Ultrasonic Anti-Bark Collar - 2 Replacement Battery 6 V

Tipping the scales at 30g, this collar is the lightest Anti-Bark System made by PetSafe. Every time your dog barks, a microphone picks up the vibration, and immediately sends your dog a mildly unpleasant ultra-sonic signal. Your dog will quickly learn to associate barking with unpleasantness. This system is only intended to be used when there are no other dogs in the immediate area! Should you have more than one dog, we recommend using the Spray Anti-Bark Collar. WhatâEURs this?