PetSafe Spray Bark Collar - PBC00-16368The PetSafe Spray Bark Collar offers a humane, spray based solution to curb nuisance barking and whining for dogs 8 pounds and up. Designed for outdoor and home use, it delivers a brief spray cue to redirect attention and promote calmer moments. Sensor Activated Spray: The collar detects barking via sound and vibration and dispenses a short burst of spray to interrupt barking and redirect your dogs attention. Size & Fit: Suitable for dogs 8 lb and up;