Brand Petainer Model 853 Quantity 1 piece(s) per pack Color Black Material ABS Suitable Pet Dog Specification The anti-barking collar stops barking with progressively increasing sound and shock which is controlled by a microprocessor distinguishing your dog's bark from other environmental noises and automatically delivers sound and shock after each bark; At the first bark it applies a short warning tone; If a second bard occurs within thirty seconds a more intense tone is sounded. From the third bark a more intense tone is sounded along with a short and mild shock; This pattern is repeated through 7 correction levels. The first two levels are only with progressively warning tone. If your dog continues to bark through the rest five levels the more intense sound and shock are applies after each bark until your pet stops for thirty seconds. If the collar continues working for 7 times it will automatically enter into protection mode which powers off the shock function and the red LED will light on for 1 minutes after that the collar will back to normal work. A best training device for your dog. Packing List 1 x Collar 4 x Screws 1 x Rope (80cm) 1 x 6V battery 1 x English user manual 1 x Transparent test piece