"Motorola's No-Bark Collar offers a unique electronic training approach to problem barking by offering 5 seconds of free natural barking before emitting a warning tone only. After which you can choose between 9 static correction levels from very gentle to firm to match your dog's temperament and personality. Should your dog remain quiet for 2 full minutes, they are again offered 5 seconds of free barking to express themselves, making the Motorola No-Bark collar a fair and consistent approach to limiting excessive barking. Motorola SCOUTBARK100 No-Bark Collar The Motorola automatic no-bark collar offers instant feedback to your dog to distract them from barking. The lightweight water-resistant collar senses the vibration produced by your dog's vocal chords when they bark and delivers a very brief static pulse, similar to the static you would feel on a door knob. After 5 seconds of free barking time, the collar unit will emit a warning tone and vibration. If your dog continues to bark, the collar will emit a brief static pulse to discourage further barking. Unlike other deterrents, the SCOUTBARK100 can sense the vibration from your pooch's vocal chords, limiting the chance of false activation. A unique algorithm prevents false activation to ensure the no-bark collar only emits static correction when it's supposed to. 9 Levels of static correction - From gentle to firm Choose from 9 levels, from tone only, a tickle to very firm"