It also depends where you’re going to hide it. A device as small as, or smaller than a smartwatch will necessarily have very small antennae for the GPS receiver. Might work OK out in the open on your wrist, probably wouldn’t work if it’s attached under the wheel arch of a car.
This is the ad. It’s a scam. You probably receive a Bluetooth luggage tag (that isn’t even as small as the obviously fake thing in the ad), or they just send some random piece of dropshipped tat, to satisfy the tracking requirements of the marketplace site they’re selling on.
