No monthly fee, easy to useTracker sends out a secure signal every two seconds for nearby Apple devices (cell phones, computers, tablets, etc.) to detect, receive, and upload to Apple's cloud servers to generate a fixed location, which can then be viewed on a map to see its exact location. View History TrackOur tracker can view historical tracks via the app to record where it has been, built-in speaker to help you search. The tracker is waterproof and weighs only 10 grams, the battery has a standby time of up to 12 months and is easy to replace for long term use. Versatile and FlexibleOur Tracker (Android and iOS Universal) When your pet doesn't like the collar they're wearing or the collar is worn out, you can attach the tracker to any new collar. Warm TipsThe package contains 1 pet collar, 1 tracker, batteries , user manual; Locator for Android and Apple phones; The item finder can only be connected to a single device, but a device can be connected to multiple trackers. Wide ApplicationmyTag can be used for dog collars, cat collars, purses, backpacks, keys, suitcases. Bring convenience and peace of mind to your life, no more fear of losing it.