No Bark Collar Collar that emits a vibration or noise to train the dog out of excessive barking Sensor in collar is triggered by the dog’s bark Lightweight collar & sensor Large size only (for dogs weighing over 11.3 Kg) The No Bark Collar is a behaviour modification device to help curtail excessive dog barking. This easy to use collar features a sensor that is triggered by the vibrations in the dog’s throat when it barks, & subsequently emits either a high-pitched noise or a vibration. The aim of the collar is to train the dog not to punish, & this method is not harmful to the dog in any way. This easy to use collar is lightweight & features an adjustable strap, making it ideal to be used on small or toy breeds. This collar is also water resistant, making it ideal for outdoor training Please brose our full dog collars & leads section.