Heart Monitor

The Heart Monitor is an item invented by Princess Bubblegum in the episode "Lady & Peebles." It helped PB and Lady Rainicorn find Finn and Jake. It also showed that Lady was pregnant with 5 babies, which until a proper name is given, are being called Corndogs.

Appearance

The heart monitor is a golden bracelet device with a small screen that pin points living beings with yellow dots.