The PetSafe Elite Little Dog Spray Bark Collar is small, lightweight collar that corrects nuisance barking with a surprising mist of spray. Its compact design is perfect for little dogs. This easy-to-use collar automatically corrects your dog each time he barks, and this consistency is the key to effective training. Soft spray stops barking. 30-40 sprays per refill, 300-400 sprays per can. Ergonomic collar with QuickFit buckle for quick release and perfect fit. For dogs up to 55 pounds. Fits neck sizes up to 20 inches. Perfect Bark sound & vibration sensors – only your dog’s bark causes correction. Waterproof collar submersible up to 5 feet. Collar uses PetSafe RFA-188 battery and spray canister (both included.) 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. If you’re not sure which bark control product to choose, contact our Customer Care team Monday through Saturday and we\’ll gladly help you decide. If this product is not meeting your needs, please contact PetSafe Brand. PetSafe brand has been an industry leading US manufacturer of pet behavior, containment and lifestyle products since 1991, helping millions of people and pets each year. Call, chat or email the PetSafe US-based customer care specialists six days a week.