Dogtra YS600 No Bark CollarDogtra YS600 No Bark Collar is an automatic bark control collar with adjustable sensitivity and stimulation levels. The YS600 detects your dog's bark vibration and delivers a brief, humane correction to discourage excessive barking. Automatic bark detection Adjustable sensitivity levels Adjustable stimulation levels Rechargeable lithium battery Compact, waterproof design For dogs 10 lbs and up Effective, humane bark control that works when you're home