Equipped with PetSafe's Temperament Learning System, this durable, waterproof collar automatically and incrementally adjusts the correction. The patented Perfect Bark™ detection uses both vibration and sounds to ensure that your small dog's bark is the only stimulus to trigger a correction. Designed for dogs up to 55 lbs. 10 levels of Light Touch correction. Two-color LED battery indicator. Operates on one PetSafe® RFA-188 battery (included).