After having the “BULK” of an AirTag crudely fixed on the outside of my wallet, I decided to buy the Rhinokey smart card, after months of sceptic deliberation. In a nutshell, smart choice, excellent product. Don’t get me wrong AirTags are great, but this smart card is better. Why?? Rechargeable, thinner, louder, has on off button, works exactly like an AirTag, fits in my wallet unnoticed, works with RFID protection cards, so much less bulk in my pocket/on my wallet. Would recommend to all. Not just for wallet use but can be used for tracking anything. 10/10