What makes it useful
Small enough for a bag pocket, with a replaceable CR2032 battery. A holder is a separate purchase unless your exact bundle includes one.
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The original AirTag is a small circular metal-and-plastic accessory rather than a key ring by itself. Apple gives the dimensions as 31.9 millimeters in diameter and 8 millimeters high, with a mass of 11 grams. That makes it easy to place in a bag pocket or dedicated holder, but compactness also means it can fall out of unsecured pockets. The genuine source photograph shows the white top and metal side of a first-generation AirTag; a second separately licensed photo depicts a real original unit during early iPhone setup.
The user-replaceable CR2032 coin cell is one of the practical ownership advantages. You can replace it without discarding the tracker, though replacement quality and battery handling matter. Apple specifies an IP67 lab-tested resistance rating under defined conditions, not waterproofness forever. Resistances can degrade with wear or damage and are no excuse to expose a tracker deliberately to harsh liquids. In a suitcase, the protective holder and placement usually matter more than its glossy surface. A single ASIN purchase should not be assumed to supply an engraved holder, protective pouch or four tags.



