One of our favorite Bluetooth trackers is on sale with this exclusive deal

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Deal : ZDNET readers can exclusively save 20% on any KeySmart SmartCard purchases from Aug. 1-31 at Amazon with the code ZDNET20OFF at checkout. This includes the latest SmartCard (Gen 3) and the SmartCard (Gen 3) Ghost model .

Also: I found 4 Bluetooth gadgets that are highly functional - and cheap

With this offer, you can grab a KeySmart SmartCard for $36 (save $9), a 3-pack for $77 (save $19), or a 5-pack for $120 (save $30). KeySmart's Bluetooth tracking cards pair with both Apple and Android devices, and provide location tracking for any essential that can store it: wallets, purses, pockets, etc. These slim cards are most popular for popping into wallets to add location-tracking services without needing to account for other popular devices like AirTags.

KeySmart's cards are ultra-thin, rechargeable, and longtime favorites of ZDNET staff like me, writer Matthew Miller , and gadgeteer Adrain Kingsley-Hughes . ZDNET's team has tested several iterations of the SmartCard over the years, including the latest SmartCard Gen 3 model .

Also: This AirTag-like card tracker is my top choice for Android and iOS users - and it's rechargeable