Features: Anti-Theft Key Finder: Smart Key-Tracker is a great little tool to remind you when you want to forget your belongings. Pair it with the apps and keep it running on the back end, once it39;s disconnected, the phone and key locator will rings to alert you, perfect for traveling and avoiding loss. Portable and Convenient: The smart key finder has a small design and is easy to carry. You can put it in your wallet as a wallet picker, or together with your phone as a phone picker or other item picker, bringing you convenience anytime, anywhere. Find Your Items: Key Locator is a great little tool to help you search and find the items you always misplaced. Just hangs it on your luggage, wallet, keychain or pet. If you can39;t find an item, double-tap the button on the apps and it will beep to help you finds it quickly and easily. Easy to Use: Use cellphone39;s Bluetooth-function to search and connect to the device, small and portable design: the key finder is easy to connect, very stable and can keep connection well. Good Choice of Present: These tracking devices can be applied by yourself, or given to your friend with poor memory, or junior. For them, these smartphone keychain alarms are considerate present to receive Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Working voltage: DC3.0V Wireless distance: 40m Package List: 1x Mini Tracker-Smart-Tags for Apple-Devices