With up to four Treasure Tags attached to keys and other everyday essentials, your phone lets you know whenever they're straying from the pack. When you inevitably lose your keys, the accompanying app can help you locate them if they're still within your phone's Bluetooth/NFC radius. If they aren't, the app will identify when your phone last saw them.
Ethan Wolff-Mann is the Gear editor for Supercompressor. He spends most of his time looking for things he lost. Find him on Twitter @ewolffmann.