I wonder what model they used. I don’t think I’ve seen one of those trackers that could be hidden in a postcard
There are ultra thin credit card size BT / GPS trackers designed for wallets. https://duckduckgo.com/?q=credit+card+size+gps+tracker&ia=we...
alt Hacker News
There are ultra thin credit card size BT / GPS trackers designed for wallets. https://duckduckgo.com/?q=credit+card+size+gps+tracker&ia=we...