Magpie can attach to car keys, luggage, or your dog and has a built-in SIM card. Magpie Magpie is a new device with a simple goal: to help you find the things you lost.

The GPS tracker is only about an inch in diameter and syncs with an Android or iOS app. It's waterproof, and it can be attached to everyday items — like keys, wallets, or laptops — or to a pet's collar or child's backpack.

There are a lot of GPS trackers on the market, many of which are about the same size and have some of the same capabilities as Magpie. But what sets Magpie apart is its built-in SIM card. This means it has an unlimited range and can work anywhere there's a cellular network — 185 countries to be exact.

Here's what it's like.