When placed, the online/offline status of the player who placed it down will be displayed on it.
- Heart Monitor's function to detect whether the player is online or not is a reference to actual heart monitors, which are generally used to detect whether a hospital patient is still alive or not.
- Only up to 32 of these can be placed in a world. A message about "wiring concerns" appears when a player tries placing the 33rd.
- It takes a while for Heart Monitors to update.