The New Generation Aboistop collar is highly effective in stopping unwanted barking. The new, re-designed anti-barking collar is to replace the mini-Aboistop. It is small, compact and lightweight. Appropriate for all sizes of dog, it is highly effective in stopping unwanted barking. A small compact unit suitable for most breeds of dog, that emits a sudden jet of odourless gas beneath the dog`s muzzle distracting the dog and stopping the barking via an inbuilt microphone within the small unit. Includes collar, spray unit, battery, 75ml odourless spray and instruction manual. Odourless refills available.