The Petsafe Unscented Spray Refill (PAC19-11883) is a great alternative to the Citronella Sprays. This product is great for people who find the Citronella smell irritating or triggering to allergies. Works with your spray collar to deter nuisance barking. Won't Stain clothing, 300 to 400 Sprays per can is compatible with all Petsafe Spray Collars.