Smart Key Finder: This key finder uses BT 4.0 technology to connect to Android, iOS, iPad, and other smartphones. Easily locate lost car keys, luggage, wallets, dogs, and cats by viewing their distance from you on the APP. The 5-pack includes black, green, blue, pink, and white trackers. Easy to Use: The APP allows for remote control. Simply download the free iSearching app and pair it with your smartphone. Press the remote, and the receiver will "beep," allowing you to hear the smart tracker within 30-49 ft. When connected to your phone via Bluetooth, the key tracker can act as a remote control button for your phone's camera shutter, making it easy to capture beautiful moments. Ultra-Low Power: Features a replaceable built-in CR2032 button battery. Finder Keychain: The compact and lightweight key finder is easily carried as a keychain on your child's schoolbag or attached to a pet collar. Real-time location tracking effectively prevents your children or pets from getting lost. The APP provides a last-seen pin-drop on the map to help you recover your items and find your car in the parking lot.