In addition to providing ground control, the Outpost also detects stealth units. Its vision range, detection range, and build radius can be further upgraded by the Comm. Tower upgrade at the cost of one extra power point. GDI Outposts can be upgraded with Shield Generator, which protects surrounding units from enemy fire, while Nod Outposts can be upgraded with Stealth Field, which conceals friendly units. Both upgrades cost one power point.