The LED on the Pip itself can flash blue, red, or green to signal different information about the Pip’s status. Here is what they mean:
Flashing green: the Pip is charging in the base station.
Solid green: the Pip fully charged in the base station.
Flashing red: the battery is below 25% and in rage of the base station.
Two Blue blinks: Pip just paired with a nearby phone
Quick flash of Red, Green, Blue: Pip just reset and is booting up