章 558: Chapter 402 Information Gap _2

With a "beep", the equipment started to activate. Then, a green light curtain shot out from the machine, rotating 360 degrees to scan the surroundings before the green light vanished, followed by a very obvious red light beam shooting up into the sky.

Seeing Dong Tianyu's puzzled expression, Gavin explained with a smile, "The green light curtain scans the area to confirm the surroundings and check for any invisible targets.

And now, this light beam indicates that their batch's battle has ended, signaling them that they can retreat from the battlefield, and that this location is also one of the safe retreat points."

Just as Gavin finished explaining, Dong Tianyu noticed several faint red light beams in the distant sky. Perhaps because of the distance from the other beams, they looked quite blurry, allowing only a vague glimpse of them.