Features: - Excellent Design: it is compact and lightweight, and it will not cause any burden to pets, looks very cute. - GPS Function: the pet tracker can locate your pet anywhere, you can see the location and movement of the pet on your phone. - Security Fence: you can set an area around locator, alarming immediately when the pet getting in or out of the area. - Remote Listening: setting the guardian's cell phone number to keep in touch. - Callback Function: setting the callback number. And click the 'sure' button, the pet 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. - 2 Location Modes: default mode: upload location every hour, 3 - 5 days standby time; precise mode: upload location every 30 seconds, 12 - 15 hours standby time Specifications: Material: ABS + rubber Network: GSM/GPRS Battery: built-in 500mAh Li-ion battery GPS accuracy: 2 - 5m Storage temperature: -40 - 85 Deg.C Working temperature: -20 - 55 Deg.C Total collar length: 65cm Adjustable collar circumference: 43 - 58cm