【ACCURATE POSITIONING WITH GPS】Our wireless dog fence uses GPS positioning technology, which is more stable and accurate than traditional dog fences. The traditional wireless dog fence system is susceptible to interference from metal or electronic products, and the positioning is not accurate. Our system avoids these issues, making it a safer and more reliable choice. 【ADJUSTABLE DISTANCE & WARNING STRENGTH】This GPS wireless dog fence can cover areas up to 3,281 feet (radius), with a maximum of 776 acres, allowing you to use it safely OUTDOORS. Its control distance is adjustable between 65-3,281ft. The vibration intensity can be adjusted in three levels and electric shock can be adjusted in ten levels. Set it up once, and the latest model has a full memory function. You won't face any INTERFERENCE issues! 【SAFETY DESIGN】If your dog goes beyond the set range, the vibration will keep working non-stop for 16 seconds, followed by a 30-second pause. It will repeat this pattern three times automatically. After warning three times, if your dog has still not returned to the safe area, the system will suspend until dog comes back to the safe area. The humanized software settings avoid any harm to your pets.