The PetSafe® Elite Big Dog Spray Bark Control emits a citronella-scented spray when your dog barks. While not harmful, the spray is unpleasant which deters excessive barking.
To refill the collar, make sure the unit is turned off. Hold the refill spray can upright and firmly press the nozzle down into the refill port. Hold for 15 seconds or until unit is full, then remove the can. If spray leaks out, you may need to press harder to complete the seal.