Item Finder - Bluetooth Smart Key Finder is a great convenience in searching or locating for your lost items and saving time. It comes with a convenient hole and allows you to tag your frequently misplaced items, such as keys, smartphones, luggage, backpacks, cameras, car key, wallets, passports, purses or other important items. It is also applicable for your pets. Smart Anti-Lost Alarm - Use your smartphone with our Nut App to track your belongings. As long as the item is out of range and disconnected (Usually the Bluetooth range is around 10-20 meters indoors and 30-50 meters outdoors), your smartphone and this keys finder will both beep to alarm you. Moreover, choose the Silent Mode if you don't need to be disturbed. One Touch Find - Sometimes you can't find the key or wallet when you go out, you can click the Call button (please click the Beep button if iphone) in the App, this bluetooth finder will beep and lead you to find them. If you forget where your phone is placed, you can double click the button on this item finder, it will ring even when your phone is on silent, allowing you to find your phone quickly and easily. Disconnected Location Record - The App will automatically record the last place where this gps key finder is disconnected from your missing items, so you can open the map in the App to speculate approximate location of your missing items. Ultra-Long Battery Life & Wide Compatibility - This smart tracker has up to 1 year battery life with an easily replaceable CR2032 button cell. This key finder works with Apple iOS (8.0 or above) and Android (4.3 or above) devices with Bluetooth 4.0. You can download the Nut app on Apple Store or Google Play.