Pet Star 2016 Advanced Version Bark Solution Shock Collar For Dogs Training System, Electric No Bark Shock Control with 7 Sensitivity Control No Harm Warning Beep and Vibration With EXTRA BATTERY PUT A STOP TO UNWANTED BARKING THE HUMANE WAY: Pet Stars 2016 Advanced Version Dog Collar stops unwanted barking with progressively increasing warning sounds and harmless static stimulus. In fact, many dogs correct their behavior through the audio feedback alone, and no static stimulus is needed. NO NEED TO WORRY ABOUT REPLACING THE BATTERIES: All Petstars products now include a free replacement battery. 100% MONEY BACK GUARANTEE: Our promise to you. We are confident enough to say that you will be fully satisfied with this Petstars product. That is why we offer a 100% money back guarantee. Its simple if you are not fully satisfied with this product we will issue you a full refund. ONE SIZE FITS ALL: Adjustable nylon leash from 6" to 30" to suit for different dogs: small, medium and large. As well as 2 sets of prongs depending on your dogs fur size. Work for dogs weighing anywhere from 10 to 120 pounds. ENSURE YOUR DOG'S SAFETY AND AVOID FALSE TRIGGERS: 7 sensitivity levels adjustable for the different size of dogs barking and specific environments through the "+" /"-" button.