This is the tracker I bought for my wallet. It arrived yesterday, and it seems really good. It is a wallet size card, said to be 1.55 mm thick. It has a weird cable/connector for charging which was necessary to make the card thin. It claims to last a year on a single charge. I better not lose the cable, though I have a good system for that. So far, it seems to act just like an airtag, and the beep is louder. I'm going to try walking out of the house and leaving it behind. It's made by ugreen which has received positive reviews for its products.