Keep your pets out of flower beds, water features and other outdoor spaces with the PetSafe Pawz Away Outdoor Pet Barrier system. The system comes with a cleverly disguised transmitter that blends into your landscape plus a receiver collar for your pet. When your pet enters the barrier zone you set up, the transmitter sends a safe static correction to his receiver collar. When you set it up as a wireless outdoor pet barrier, you can adjust the circular boundary range up to 16 feet in diameter, or you can create a custom-shaped barrier using up to 150 feet of boundary wire (sold separately). This extra pet barrier only works if your pet is wearing a compatible Pawz Away Extra Receiver Collar or Yardmax Rechargeable Receiver Collar, sold separately. When your pet approaches the off-limits area while wearing a compatible collar, they will feel a safe but startling static correction that will deter them from lingering in the area. With a little time and training, your dog will learn to stop digging in the garden (and your plants will thank you). You can add an unlimited number of pets to the system if they're wearing a PetSafe Pawz Away Receiver Collar (additional collars sold separately). You can also set up an unlimited number of “off limits” areas with additional collars.