Teach your pet to avoid areas in your landscape. Designed as a rock, the barrier blends seamlessly into your landscape. No more getting into the trash, jumping into pools or ponds or digging in your flower beds. When your pet enters the barrier area, they will hear audible tones from the receiver collar and then they will feel a safe, progressive static correction delivered through the contact points on the collar. The progressive static correction may startle your pet, but will not cause harm. They will quickly associate the unpleasant correction with the area you have declared off-limits. The wireless option is quick and easy to set-up. It covers up to 16 feet in diameter. The receiver collar is lightweight, waterproof and fits pets 5 lbs. and over with neck sizes 6” – 28”. The collar requires 3-V lithium batteries (included). The transmitter requires 4 alkaline D batteries (not included). There is also a test light tool and an operating and training guide included. There is also a manufacturer lifetime limited warranty. Non-returnable 3 days after receipt.