The SportDOG Brand NoBark SBC- 8 is our easiest-to-use bark collar with its simple but effective design. Simply turn the collar on and place it on your dog. With eight levels of Progressive Correction and our Silent Partner bark-detection technology, the SBC-8 will begin training immediately, only delivering consistent, reliable correction. The Progressive Correction starts at the lowest level of static stimulation and increases each time your dog barks within 30 seconds. After 30 seconds of quiet, the collar will reset back to the lowest level.