Excellent Design: It is compact and lightweight, and it will not cause any burden to pets, it looks very cute. GPS Function: The pet tracker can locate your pet anywhere, you can see the pet’s location and movement on your phone. Safety Fence: You can set an area around the locator, alarming immediately when the pet enters or leaves the area. Remote Listening: Set the cell phone number of the guardian to keep in touch. Reminder Function : Setting the callback number. And click the ‘safe’ button, the animal tracker will automatically call the phone number you set. Water Resistant Design: It is water resistant and suitable for use in a variety of environments. Adjustable collar circumference: 43 - 58cm .