Sinduc Electronic Anti-Bark Dog Training Shock Bark Collar Terminator Controller A much more humane way of training your dog.Increasing sound and gradually shock.Voice Recognition feature minimizes false triggering. Microprocessor Voice Recognition to recognized your Dogs Barking.Automatically increases tone and shock stimuli as barking persists. Ultrasonic Sounds, Vibration and Shock are all used to Train your Dog. Water resistant, rain and snow will not affect operation. Effective on dogs weighting as much as 150 pounds or more.Collar Circumference Adjustable from 20 - 53 cm, Fit Almost Any Dog. Feature: Weight: 70g,Power: 6 Volt Alkaline Battery,Collar Circumference Adjustable Length: 20 - 53 cm,Size of Black box: 6.3 CM x 3.5 CM x 3 CM (L x W x H) Package Included:1 x Battery,1 x User Manual,1 x Electronic Anti-Bark Dog Training Shock Collar