With the Apple AirTag 4-pack you can find all your valuables in no time. Attach the wireless tracker to your keyring, wallet or bag, for example. Wherever you place it, your stuff will automatically appear on the card in the 'Find My' app of your Apple device. The location is shared with a U1 chip in the tracker via Ultra Wideband technology. This makes the location much more precise than via bluetooth. However, the tracker uses bluetooth for close search. Also find your valuables at great distances, by sharing your location with your other Apple devices. The AirTag battery lasts about a year and is replaceable, a CR2032 battery. As soon as you get close, the AirTag makes noise. Finally, the AirTag is waterproof. You'll find your stuff even faster.
 
Here's what you get.
 
4x Apple AirTag, 4x CR2032 battery, manual