Instant fence electronic containment system. With no wire to bury, you can have the instant fence set up in minutes. Instant fence uses a constant radio signal to create a safe zone . When your pet attempts to leave the area, he receives a warning tone, if he continues a mild correction is given. The signal field can be adjusted anywhere from a 10' to 90' radius from the transmitter. System includes the transmitter, 1 receiver, 50 boundary flags, a video, and manual for installation and training.