Description: PET NO BARK COLLAR KIT! When your dog barks for the first time, the collar issues a short caution tone. If the barking continues within 30 seconds, it issues intense warning tone and short soft shock. If barking continues, the collar continues to emit increased warning tones & shocks. After the seventh shock, the collar stops functioning for 1 minute. Over time, the dog will learn their behaviour triggers the tones & shocks, stopping them from barking. Specifications: Colour : black Size:7*3.5*3.5cm/2.76*1.38*1.38 inches Package list: 1*nylon dog belt(72cm/28.35 inches) 1*user manual 1*bark stopper 2*metal contact point (12mm/0.47 inch) 2*metal contact point (15mm/0.59 inch) 1*6V dry cell 1*electric current tester