The Pawz Away Threshold Pet Barrier allows you to keep your pet from going through doorways or upstairs without the need for bulky, inconvenient pet gates. By placing the barrier at a doorway or stairwell, your create a wireless barrier for your pet. When your pet approaches the barrier, the collar is set off by the radio waves emitted by the barrier. The collar will then emit a series of warning tones followed by a safe, progressive static correction. Your pet will quickly learn which areas to avoid. Additional barriers and collars can be added to create a safe area for your pets to roam and your peace of mind.