Wireless fence electronic containment system. With no wire to bury, the containment system is set up in minutes. 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-foot to 90-foot radius from the transmitter. Ideal to use on a medium to large size dog. Automatic shut-off, low battery indicator, expandable containment size, adjustable waterproof collar. System includes: 1 transmitter, 1 receiver, 50 boundary flags, 1 video, and 1 manual for installation and training.