2 REPLACEMENT BATTERIES: Two 3 volt CR2 lithium metal replacement batteries included COMPATIBILITY: This battery is compatible with the PetSafe Deluxe Anti-Bark Spray Collar as well as Pawz Away Receiver Collar U.S.-BASED CUSTOMER CARE: Our pet product experts are here to help you and your pet and are available by phone, email or chat if you have any questions QUALITY PROMISE: PetSafe brand has been a trusted global leader in pet behavior, containment and lifestyle innovations since 1998 to help keep your pet healthy, safe and happy