Working principle of outdoor GPS wireless electronic fence\nThrough GPS satellite positioning,set the center point and safe radius distance for pets Free movement within the set safety range.\nProduct advantages:\nEasy to use: Simply wear the GPS dog fence collar on the dog without the need for additional devices or app downloads. It effortlessly creates a happy park for your dog.\nEnhanced signal:electronic dog. globally compatible and can receive signals from up to 87 satellites.\nExtra large range: You can adjust it to a radius of 49 to 6561 feet (15 to 2000 meters).\nRechargeable: The receiver collar is equipped with a 1000mAh rechargeable battery that can be fully charged within 2 hours.\nPunishment zone protection mode: 2000~2050m\nIf your dog exceeds the set range for more than 3 seconds, the fence collar will activate and work continuously for 60 times (approximately 5 minutes). If he is still in the penalty area, he will enter protected mode and then click any button to exit protected mode.\nFault area: above 2050 meters\nNote:\n1. For outdoor use only\n2. Not suitable for aggressive dogs\n3. The first use should not exceed 4 hours. During normal use, do not collar your dog for more than 10 hours per day. The adaptation period of dogs is about 7-10 days. Train your dog to understand the meaning of beeps and vibrations before using this product.