Key Finder, Geckone Bluetooth Item Tracker, Key Tracker, Phone Tracker, Wallet Tracker, Bag Tracker, Remote Control Shutter -Green This product needs to be worked with appication, the APP name is inumen. This product uses BLE 4.0 technology, it supports IOS and ANDROID phone. For iOS: It needs IOS7.0 and above O/S& bluetooth 4.0. Support IOS: iPhone4siPhone5/5c/5siPhone6/iPhone 6 PlusiPad4iPad mini, iPod touch. For Android: It needs android 4.3O/S and above& bluetooth 4.0. Support Androids:Samsung Galaxy S4, S5, Note2, Note3 and more in the future.(Do not support Bluetooth 4.1,4.2 Phones) SMART FINDING FUNCTION:The inumen APP will display the distance between you and your items by percentage that displayed in APP . You also can tap the speaker button to ring your lost items. ANTI-LOST ALARM FUNCTION:The Anti-lost feature allows your phone to notify you when your connected device is out of range. An alart will sound (if phone valume is on) and a pop-up will appear on your screen to notify you. You may switch the Anti-lost feature off, but note that your phone will no longer alert you if your item is out of range. PHONE FINDER FUNCTION: Quickly double click the connected device's camera button to active your phone's alert sound. SELFIE FUNCTION:This product use BLE 4.0 technology, you can take the picture wirelessly in a certain distance. LAST SEEN TRACKING:While the smart finder lose connection with your phone, the APP will record the last seen location on the map. 1 Year Warranty!