• Train your dog to stop barking without having to suffer the more intense stimulus
• Automatically increases tone and shock stimuli as barking persists
• Stops barking with progressively increasing sound and shock which is controlled by a microprocessor distinguishing your dog's bark from other environmental noises and automatically delivers sound and shock after each bark
• There is a switch used to adjust the sensitivity to the bark and the sensitivity will gradually be enhanced or weakened. The more sensitive, the easier to trigger the collar
• Comes with a test light to connect positive and nagative together inorder to test whether this product can work
• The collar with adjustable strap fits snugly underneath your dog's neck 
• Power by a 6 volt battery(included)
• Great training device to help improve you dog’s behavior

Package includes:

• 1 x Bark Controller with adjustable strap
• 4 x Special Screwdriver
• 1 x Test Light
• 1 x 6V Battery
• 1 x English User Manual