Step forward the KeySmart Dual Band Smart Card, a tracker which works with both, doesn’t need an app of its own, and has wireless battery charging. All the key specsEverything you needThe KeySmart Dual Band Smart Card is ridiculously slim. Connecting the cardFuss-freeThe Dual Band Smart Card is primed for connection using a hidden button on the front. Available to buy nowThe KeySmart Dual Band Smart Card is available to buy from KeySmart now, and it costs $40. KeySmart Dual Band Smart Card The KeySmart Dual Band Smart Card is an item tracker shaped like a credit card, which operates with both Google's Find Hub and Apple's Find My services.