Key Finder, Geckone Bluetooth Item Finder, Phone Finder, Wallet Finder, Bag Finder, Remote Control Shutter -Black TO USE THIS PRODUCT YOU NEED TO FIRST DOWNLOAD THE "INUMEN" FREE APPLICATION FROM YOUR APP STORE - It works with BLE 4.0 and supports both iOS and Android smartphones. For more compatibility information please check the description of the product below. SMART FINDING FUNCTION - The application will search and find your lost items in no time. Once they are located it will calculate the distance and the information will be displayed on your screen in the form of percentages. You also can then tap on the speaker button to get an alarm signal and locate their position. ANTI-LOST ALARM FUNCTION - The Anti-lost feature allows your phone to notify you every time when your connected device is out of range, as long as your phone is not in silent mode. You will first hear the alarm go off and then you can expect to receive a pop-up notification. You may switch the Anti-lost feature off but note that once you do your phone will no longer alert you if your item is out of range. PHONE FINDER FUNCTION - Find your phone with a quick double click of the camera button on the Key Finder, which will call your phone to find its location. SELFIE FUNCTION AND LAST SEEN TRACKING - This product uses BLE 4.0 technology, which allows you to take perfect selfies wirelessly within a certain distance and even after disconnecting the application will show you the last location for your lost device in on the map. We give a full 1 Year Warranty for all our Key Finders!