NO MONTHLY FEE, ANTI-LOST RADAR SERCHING: Petfon GPS tracker is free of any service fee or monthly fee.The small, durable, and rainproof device allows you to track your pet's activity and pinpoint his/her location in real time. Petfon GPS tracker combines GPS, WiFi, bluetooth, and long distance wireless technologies for accurate real-time positioning.The unique Rada serching feature can help you find the direction of the lost dogs. 🐕REAL-TIME & LONG DISTANCE TRACKING: Petfon GPS Tracker is easy to install and use. Just download the Petfon app and follow the instructions. With the app, you can view your pet's activities and pinpoint his location at any time. The tracking ranges can be up to 0.65 miles in downtown/dense space and 3.5 miles in an open environment. But it will be effected by surarroundings. LONG STANDBY BATTERY,LIGHT WEIGHT & RAINPROOF: The Petfon GPS tracker is small and durable (42mm*42mm*18mm, Weight: 27.6g). The rainproof feature enables it to work in wet weather but do not working for swimming. Petfon GPS Tracker's battery can last up to 8-16 hours and comes with a compact charging station. It can recharge the device multiple times, which is perfect for going off the grid. 🐕NOTE: The Petfon GPS Tracker is optimized to let you track your pet during walks.If you need to track your pets when you are inside the house with pets running outside, the performance could not be guaranteed, the connection could be very unstable due to massive obstructions between controller and tracker. We will offer Petfon Home Kit for you after October.