PetSafe Audible Bark Collar features unique SoundBurst technology to detect your dog's barking and instantly emits a sound to distract.You don't have to worry about your dog being affected by another dog's bark or other loud noises. This collar runs on both vibration and sound before it is activated.The collar interrupts your dog's barking quickly and consistently. 70% of users report that their dog barks less within the first few days.PetSafe Audible Bark Collar facts:Anti-sound collar with distracting sounds.Fits most dogs over 3.5 kg.Waterproof so your dog can wear it in any weather.Works both indoors and outdoors.Recharges quickly (with the included USB charger).Charge lasts up to 40 hours.SoundBurst technology.