The PetSafe Deluxe Anti-Bark Collar has two primary features designed to shorten the training phase and promote good behaviour.First, the Deluxe Anti-Bark Collar has a unique patented sensor that provides the most reliable bark detection available. The Deluxe Anti-Bark Collar uses both vibration and sound sensors (dual-detection) to discriminate each bark from other external noises. A Static Correction is administered through the Contact Points only if both the vibration from the vocal chords and the sound from the bark match the same criteria.Second, the Deluxe Anti-Bark Collar has a patent pending Temperament Learning System design that is effective across many dog breeds and their individual barking behaviours. The Temperament Learning System contains software that tracks the number of corrections needed to substantially reduce (and in most cases eliminate) the number of nuisance barks.The system has 10 levels of Static Correction. It begins with low-level corrections, however, if excessive barking continues the correction intensity will increase with each successive bark until the barking stops. Once the dog has learned to reduce the barking, the initial warning corrections are reduced. As a built-in safety feature, if your dog barks 15 times or more within a 1 minute 20 second period, the Deluxe Anti-Bark Collar will automatically shut off for 3 minutes.Patented Perfect BarkTM technology ensures your dog's bark is the only sound that will cause the correctionTen levels of self-adjusting correctionWaterproofGood/low battery indicatorOn/off position for longer battery lifeAdjustable nylon collar for neck sizes up to 71 cmDesigned for dogs 18 kg +PetSafe RFA-188 Battery includedPackaging in EN/FR/NL/ES/IT/DEInstructions in EN/FR/NL/ES/IT/DE/DA3 Year Warranty