From the manufacturer:

Automatically stops your dog's annoying barking

The quick and highly effective way to manage your dog's excessive barking. Innotek's auto-set feature means no external control or programming hassles. Automatically helps your dog teach himself to remain quiet. Correction level is set by the dog; auto shut-off and reset features.

How it works: This collar senses when your dog barks, and corrects her promptly and humanely. Unit senses only your dog’s bark; it’s never triggered by noises around her. Static correction is a mild tingle, and the collar adjusts correction based on your dog’s temperament. Dogs quickly learn when it is appropriate to bark, and when it is not.

• Water-resistant
• Replaceable battery (6v battery included)
• Activated only by your dog's bark
• Auto-set means no external controls or programming to hassle with

View a video on this collar in the Video tab.