Here is a smart card that helps you find your misplaced items. The Seinxon Finder Card comes with Bluetooth 5.2 connectivity with a range of 200ft. It is designed to work with Apple’s Find My app. You can use the Finder Card & Finder Mini to track valuable items, pets, and everything in between.
This item tracking card is slim enough to easily fit in your wallet. It has a rechargeable Lithium battery. Seinxon is IP68 rated. It has a 80-100dB alarm. This project is getting funded on Kickstarter. You can find out more about it here.