The PetSafe® Spray Bark Dog Collar is designed to help stop nuisance barking and whining with spray technology. It is great for use outdoor in the park with your dog, or in the house at night when you want to sleep. The sound and vibration of your dog’s bark triggers the sensor, emitting a burst of citronella spray –helping to stop the unwanted behaviour. The spray The PetSafe® Spray Bark Dog Collar is designed to help stop nuisance barking and whining with spray technology. It is great for use outdoor in the park with your dog, or in the house at night when you want to sleep. The sound and vibration of your dog’s bark triggers the sensor, emitting a burst of citronella spray –helping to stop the unwanted behaviour. The spray cartridges are convenient to replace and there are no batteries required. Simply recharge the bark collar with the included charger. The adjustable collar is designed to fit dogs 3.6 kg. and up with necks up to 68 cm. in circumference. The Spray Bark Dog Collar will help you enjoy time outdoor and indoor with your dog without the nuisance barking.Key Features:*No Barking or Whining – The PetSafe® Spray Bark Collar uses a burst of spray to help stop nuisance barking or whining*Fits Small to Large Dogs – The collar is designed for dogs 3.6 kg. and up and is adjustable for necks up to 68 cm in circumference*Easy-to-Replace Refill Cartridges – One unscented and one citronella refill cartridge are included and provide 35 sprays each*No Batteries Required – The PetSafe® Spray Bark Collar is rechargeable, use the included USB charger when the rechargeable battery gets low; average battery life is 40 hours depending on use*Low Spray and Battery Indicators – The collar notifies you when the spray or battery is low; a red LED light flashes when the battery is low and a yellow LED light flashes when the spray is low*Water Resistant – Great for dogs that like to play outdoors Features:*For dogs 3.6 kg and up*Fits neck sizes up to 68.6 cm*1.9 cm wide*Vibration sensor detects dog's vocal chords moving*Water resistant*Uses a rechargeable battery (built-in; non-replaceable)*Battery usually lasts 40-50 hours*Battery recharges in 6 hours*Low battery indicator System Includes:*Spray Bark Collar *USB Charger *Spray Cartridges