The only listing here that names a feature it does not have
Spotminders MFi tracking card, 4-pack
The most completely specified tracker on this shelf — thickness, rating, immersion depth, loudness, range, battery — and the only one to state what it cannot do.
This is the most completely specified product in the American half of this hub, and the specification is the reason to consider it. One point eight millimeters thick, which is seven hundredths of an inch. IP68, with the depth and the duration spelled out — 3.3 feet for thirty to sixty minutes — rather than left as a code. A hundred decibels, the loudest alert on this shelf. Three hundred feet of Bluetooth range, the longest here. Up to eight months per wireless charge, on a card stated to last over five years. Every one of those is a figure another listing on this shelf leaves out.
The thickness is not a boast, it is the function. The buying tip at the top of this page asks you to put the tracker deep inside the case instead of a pocket somebody can reach, and every tag on this shelf hangs on the outside of the bag where it can be unclipped. A card this thin slides into a wallet, a passport holder or flat behind a case lining and is simply not visible. That is the best answer to this hub’s own advice in the American half, and it falls out of the shape rather than being claimed.
The other unusual thing is the honesty. Two of the ten bullets name things the product does not do: no wireless charger in the box, and no support for Precision Finding, which means the app gives you a map and a sound but not the arrow and the distance that walks you the last few meters. On a shelf where one product calls Apple’s Bluetooth relay a GPS tracker, a maker that publishes its own gap has earned a line.
What it costs is the highest price in this hub, in either half — about three times the per-unit price of the other four-pack on this shelf, where four plastic tags on loops come with a replaceable coin cell, 80 dB and 130 feet and no water rating at all. The question is narrow: if a tag on a handle will do, the cheaper pack is four trackers for a quarter of the money. If the tracker has to vanish into a lining, nothing else here goes that thin. And a card has no loop and no hole, so it must be slipped somewhere rather than attached to anything.
Availability
Read on the day this page was built: $95 at the American Amazon shop.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
Prices quoted in this text were read on 2026-10-07. The live price is at the top of the page.
What travelers ask
What does 1.8 mm (0.07 in) let you do?
Hide it. This shelf's buying tip says to mount a tracker deep inside the case rather than in an accessible outer pocket, and a card seven hundredths of an inch thick is the only thing on this shelf that will slide behind a lining, into a passport holder or into the card slot of a wallet without a bulge. Every tag on this shelf has to hang on the outside; this does not have to hang anywhere. That is the single best answer to the buying tip in the American half of this hub, and it is a consequence of the shape rather than a claim.
Why is it worth noting that it says what it cannot do?
Because nothing else on this shelf does. The last bullet states that the card works only with Apple devices and "does not support Precision Finding (UWB)" — which means the Find My app will show you a position on a map and play a sound, but it will not give you the arrow and the distance that walks you the final few meters to an AirTag. That is a real limitation, disclosed in the listing, alongside the equally plain statement that no wireless charger is included. On a shelf where another device calls a Bluetooth relay GPS, a maker naming its own gap is worth the sentence.
Is it worth three times the other four-pack?
It depends entirely on where it has to go. Both are four Apple Find My devices. This one is 1.8 mm (0.07 in), IP68 to a meter, 100 dB, 300 ft, eight months per wireless charge and a stated five-year life. The other is a plastic tag with a loop, no water rating at all, 80 dB, 130 ft, and a replaceable coin cell lasting a year. If a tag on a handle is acceptable, the cheaper pack is four trackers for a quarter of the money. If the tracker has to disappear into a wallet or a lining — which is what the buying tip recommends — nothing else on this shelf will do it.
