Five years after the first portable, wall penetrating, radar, went to Iraq, there have been several generations of more reliable and capable devices have been developed and shipped. The latest one is Prism, whose improvements largely have to do with speed (the image of what is behind the wall is produced faster) and accuracy (more detail is shown) and reliability (more resistance to dust, water and rough treatment.) The Prism battle weighs 5.6 kg (12.3 pounds), has an eight hour battery and a range to 20 meters (63 feet). Throughout this period, the devices have retained their small size (hand-held) and weight (under 6 kg/13 pounds).
Three years ago, two years after the first of these systems, RadarVision, became available, the Xaver 400 arrived. This one weighed 3 kg (6.5 pounds), and could see through non-metal walls at a range of up to 20 meters (63 feet). The battery lasted 2.5 hours and the device could broadcast images, up to a hundred meters, to another display.