Easy to Use: The mini item locator support iOS/ Android 4.3 system or higher (require Bluetooth 5.0). 1. pls download the App "iSearching" from the App store, or scan the QR code with the coming manual, 2, Press the button for 3 seconds, the key item finder will turn on after hearing 3 beeps and the indicator will flash10 seconds, 3,Use phone's bluetooth to connect the GPS tracker; 4,Press buttons with 3 seconds and hearing a long beep, the device turn off. Two-Way Anti-lost:The smart key tracker is a great gadget to alert you when you are about to forget your belongings. your phone and key locator will both ring to alert you once disconnected,Your phone would alarm when the phone missing by double pressing the tracker's button,or you can check the map location or clicking the alarm on the App after missing the anti-loss device,the finder will sound,too; One phone can link to several trackers. Long Battery Life & No Mothly Fee:The bluetooth key tracking device is powered by CR2032 battery with super long standby time over 6 months and can be replaced easily for long-term use. Delicate and elegant appearance makes it look like an art of pieces. One time purchase for lifetime use without any monthly fee. Widely Using: The key locator is a great anti-lost alarm reminder to help you search and locate items you always misplaced, you can hang on the finder toyour phones, keys, bags, umbrellas, pets, dogs,cats, wallets, purses, luggage,dog&cat pet collar and other important items, convenient for you to find them quickly and easily, bringing a lot of convenience and help you avoid any losses to your life; The tracking range is about 90 feet. Great Gift Choice with Portable Carabiner:The key finder is designed in a lightweight compact size and coming with a portable round carabiner, you carry it to any place without any bulks ,or can put it or hang it to any stuff you needed as a item tracker, bringing convenience wherever and whenever you are.A must-have and worhty gift for the family.