KeySmart SmartCard Wallet Tracker Card & Airtag Holder Key Organizer in Vegan Tectuff Leather SmartCard - Ultra Slim, about the size of 2 credit cards, Waterproof to IPX8 which is the highest rating, up to 5 months of battery and rechargeable via a wireless charger. Wireless charger is not included in this bundle and must be purchased separately. Compatible with Apple Find My App: Add your KeySmart Card to Find My App on your Apple iOS device. Play a sound on your KeySmart Card to find it nearby with Bluetooth, or locate it through GPS with the Apple Find My Network, with the help of hundreds of Apple devices around the world. Does not work with Android devices. Get Notified When You Leave It Behind and Lost Mode Helps you Get it Back. The Apple Find My app proactively prevents you from losing your wallet or ID card by sending notifications to your iPhone, CarPlay, or AirPods if you leave your KeySmart Card behind. With Apple's advanced encryption system you have built in privacy that ensures your KeySmart Card won't be tracked by other people. Airtag Holder Key organizer in our Tectuff Vegan Leather material. Track your keys with Apple Airtag. Fits up to 5 keys and includes an O shape Carabiner Ring to easily clip on your Car Key Fob or KeyChain essentials.