iMeshbean Electronic No Bark Control Dog Training Collar, an and Effective Pet Training Device for Medium/Large Dog Pet, Keeping a Quiet Environment At Home/indoor High-quality Electronic Anti-Bark Dog Collar and Sends harmless warning sound and shock to the dog whenever it barks Giving your pet plenty of warning before it becomes painful. The bark terminator's unique pattern of increasing sound and shock quickly teaches your pet that it is its own bark that is causing the discomfort. The humane approach to bark control Extremely small and light weight, The bark terminator is controlled by a microprocessor which distinguishes your dog's bark from other environmental noises and automatically delivers sound and shock stimuli after each bark. The output level of sound and shock is increased gradually as barking. 30 days money back,99.9% Posivtive Feedback,Buy with Confidence!3 Year Warraty!