WESTLINK Smart Tag Nut 2 Bluetooth Anti-lost Tracker Wallet Key Finder Alarm Patch GPS Locator Finder(White) When connected with phone, it can be located.Two-way anti lost. When a NUT is attached with your car, the APP will record where your car is parked and show you the location on the built-in map Really mini design,fits into your wallet,and key rings etc. You can manage 6 bluetooth tracking tag at the same time to manage various belongings Compatible with IOS 7.0 system and Android 4.3 system version/bluetooth 4.0