Meaning
A small rectangular pager with a narrow screen and a button or two, the clip-on gadget that beeped to show a short number or message before mobile phones were everywhere. It means being paged or reachable.
Today it is mostly nostalgia or a joke about being old-fashioned, but it still fits on-call jobs where staff get buzzed: “On call all weekend 📟 so if I vanish mid-dinner, that’s why.” It pairs well with 🏥 for hospital shifts.