Look! In your hands! About the size of a deck of cards! It's a bird! It's a plane!
Well, no, it's a hotspot - portable Internet on the go. Hotspots connect to the cell phone towers, and then provide a WiFi signal for tablets, smartphones, computers and laptops to pick up and connect to.
These hotspots are usually much faster than the old dial-up modems they replaced, and can be taken with you just about anywhere. However, pay attention when you check one out, because there are special rules for returning them!