The Clix No-Bark Dog Collar is designed to stop unwanted barking, the collar features a microphone which detects barking and automatically emits either a sound or vibration to interrupt the dog”s barking. nThis Collar has been completely redesigned, not only in terms of aesthetics, but the functionality and software have also been improved. nClix No-Bark Dog Collars ergonomic shape are comfortable for the dog to wear and the muted grey colour has a more subtle appearance. nThe material collar is fully adjustable, for a correct and comfortable fit. nSmall neck size 24-42cmnAlso available in separate listing: Large 38-74cm.