【Accurate GPS Positioning Technology】The E-Fence wireless dog fence system uses GPS positioning technology. Through upgraded software and hardware technology, the signal is more stable and the product is more reliable. The wireless boundary range formed at the same time is more precise. The GPS dog fence system can help you solve the problem of signal interference. By using the ‘REMEMBER’ function of the device, the product can be quickly positioned to the last used center point. [More Dog Health Design] Compared with traditional GPS devices, E-Fence GPS wireless dog fence adds the function of monitoring dog heart rate, body temperature and step counting. The purpose of this design is to monitor the dog's health status while ensuring the dog's safe activities, so as to ensure the dog's safe/healthy/free play. At the same time, our products have also passed UL and IP7 waterproof certifications in the United States and Canada. [Adjustable Alarm Intensity and Boundary Range] The E-Fence wireless fence system can adjust the intensity of sound, vibration or electric shock according to the adaptability of different dogs. Sound can be on/off. Vibration intensity can be adjusted from 0 to 5. The intensity of the electric shock can be adjusted from 0 to 10. It’s more adjustable to face dogs of different sizes/different personalities. The combination of the three modes can train dogs faster, better and safer.