Bluetooth trackers get smaller and smaller every year and this newest one from TrackR Pixel is one of the most impressive yet. It's just a tad bigger than a quarter so you can throw it on virtually anything to keep track of it. It's also got LED lights that flash when activated, a ringer, family sharing, crowd location, and it can even connect to Alexa.
Oh, and the best part? It uses a regular 'ol (and very common) coin battery so you don't have to keep buying TrackRs when the battery runs out. TrackR Pixel is compatible with both iOS and Android phones and connects via Bluetooth 4.0.