The Garmin BarkLimiter 2 is a bark correction device that uses accelerometer-based bark identification to distinguish between repetitive barking and other sounds. Then it corrects bad barking behavior with on-collar tone and vibration or 10 safe stim levels. For even more capability, BarkLimiter 2 works with the free Garmin Canine app on your compatible smartphone or tablet. Use the app to set up your BarkLimiter 2 device and enable your phone or tablet to serve as a wireless handheld component for your system. The app lets you remotely adjust settings and select automatic or manual stim levels. Plus, you can also review bark history data to see what times of day your dog tends to trigger corrections. The BarkLimiter 2 comes with a 3/4" black collar strap or easily snap onto your dogs existing collar (up to 1 wide and up to 0.12 thick), short and long plastic contact points, and a charging/data cable.