It was the Bluetooth of the past. Send and receive messages out of thin air. In modern times, we call it email. The easiest and best way to get a hold of us, 24/7, 365...
It's okay, we don't bite much. Just like generations before you used to do back in the day... walk in and talk to another human; no credit card, no internet required, and no age check. Ah, simplistic.