No Bark Control Dog Collar PET853 with 7 Levels Button Adjustable Sensitivity Control -Black Nylon Collar, An and Effective Pet Training Device for 8-120 Pounds Dog -An Effective Device Keeping a Quiet Environment at Home/Indoor Generally recommend for 18-120lbs dogs Lightweight receiver perfect for toy or small breeds Includes receiver, operating manual and replaceable 6-volt battery Adjustable nylon collar senses vibration in dog's throat during barking Bark-control collar sends harmless static shock to the dog whenever it barks