Losing your keys before leaving the house is one of those small daily frustrations that a $13 tracker eliminates permanently, and Prime Day just made that math even easier. Amazon has dropped the Life360 Tile “Essentials” 4-pack to $51, down from its $74 list price, which is a record low for this set of four Bluetooth trackers covering keys, wallets, bags, remotes, and anything else worth keeping track of. This is a Prime Day deal behind the Prime paywall, though the 30-day trial runs without a card if you need it.

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Four trackers, four things you’ll never search for again

The Tile Essentials 4-pack includes a Mate, a Slim, and two Stickers, which between them cover every attachment scenario. The Mate clips to a keyring, the Slim slides into a wallet without adding meaningful bulk, and the Stickers attach to remotes, laptops, luggage, or anything with a flat surface. Each tracker connects via Bluetooth with a range of up to 350 feet, which covers most home and office environments without needing to be in the same room as the tracker to locate it.

Finding a lost item works in two directions. From the app, you can make the Tile ring at full volume to locate it by sound, even if it’s wedged between sofa cushions or buried in a bag. If it’s out of Bluetooth range, the Life360 network of other Tile users passively detects your tracker and updates its last known location on the map without the other user knowing or needing to do anything. That network effect is what separates Tile from a simple Bluetooth beeper: the more Tile users there are, the more effectively lost items get found across a wider area.