The Xaver™ 400 allows quick location of people hidden by walls and barriers, enabling tactical teams to step into the known and obtain mission-critical information. The Xaver™ 400 is a compact, lightweight and durable personal device, optimized for the speed of tactical entries. The Xaver™ 400 gives special ops and rescue forces critical information in real-time about the number of people and their location behind a wall. Simple to operate, the Xaver™ 400 provides vital information when and where it is needed.