This is a Condition. [link{pneumaticcraft:progwidget/conditions}]Click here[link{}] to read general information about Conditions.

Note: although this piece is named 'Drone Condition: RF', it actually uses Forge Energy, which is RF-compatible, but not necessarily limited to just RF.

The 'Drone Condition: RF' piece lets you check the amount of energy stored in the drone's internal buffer.