This product is a Bluetooth wireless device running the “isearching” application. Before using it, you need to place things that are easily lost with the product together. In the effective Bluetooth connection range about 25 meters. You can make the product beep to find your things with your phones app, you can double click the product’s button to cause your phone ring and you can use the product to take photos. With these features you can find anything you want to find with ease. Such as keys, bag, remote control, wallet, mobile phones, etc. When the product is out of range with your phone’s Bluetooth the alert will be triggered in both of the product and your phone and last know location will be marked on the map in the isearching app. To use this feature you need to open the phone alarm while lost function in the settings. With these features your belongings and mobile phone will be protected in a specified range. If you forget to take your belongings you will be reminded with your phones alert. If your phone is left behind you will be reminded with the trackers alert. To use this product you will need both of the following: Bluetooth 4.0 Apple iOS 11 and higher android 8.0 and higher. Comes with a very detail instruction manual.