GPS ACCURATE POSITIONING】🐶 Our wireless dog fence uses GPS positioning technology, which is less interfered by the outside world, and 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. So choosing our dog fence system is safer and more reliable. 【ADJUSTABLE DISTANCE & WARNING STRENGTH】🐶This GPS wireless dog fence can cover areas up to 3281 feet radius and up to a max of 776 acres allowing you to use it for OUTDOORS. Its control distance is adjustable between 65-3281ft. The vibration intensity and electric shock can be adjusted in three 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 or electric shock will keep working non-stop for 16 seconds, followed by a 30-second pause. Then it will repeat this three times automatically. After warning three times, if your dog has still not returned to the safety area, the system will no longer work until dog comes back to the safety area. All in all, the humanized software settings can avoid any harm to your pets. 【SIMPLE TO USE】🐶GPS wireless dog fence has only a collar receiver, NO NEED to purchase ADDITIONAL CABLES AND TRANSMITTERS to work. In minutes, you can set the boundary on the collar and put it into use. The GPS wireless dog fence system is small in size and light in weight, which is convenient for you to carry at any time.（ Please Note that this circle is most suitable for open fields or farms, not for houses and places with lots of trees）