The PetSafe Spray Bark Control Deluxe Collar is the safe, easy way to train your dog away from uncontrollable barking. This light, comfortable collar utilizes Nano Technology, resulting in the smallest anti-bark collar possible for your dog. The PetSafe Spray Bark Control Deluxe Collar uses Patented Perfect Bark detection, ensuring that your dog's bark is the only sound that will cause the collar to issue a correction. The PetSafe Spray Bark Control Deluxe Collar is simple to use. When your dog barks, the collar will release a burst of lemon-scented spray that you dog will dislike. The spray is not at all harmful to humans or animals and dissipates quickly. This blast of lemon-scent will help prevent your dog from uncontrollable bursts of barking. If your pet has a behavior problem related to barking, whether it be late-night noise or scaring strangers, the PetSafe Spray Bark Dog Collar can help you modify and refine your dogs behavior to be quieter and more pleasant.