D-Tect120 Bosch Wall/Floor Scanner with Radar D-Tect120 Bosch Wall/Floor Scanner with Radar features Spot Detection technology that can detect objects instantly when places on a wall, panel or floor and never needs calibration. D-Tect120 Bosch Wall/Floor Scanner with Radar has three modes – drywall, universal and concrete – making the right detector for multiple jobs. D-Tect120 Bosch Wall/Floor Scanner with Radar offers sound and a light to show when something is detected behind a wall, panel or under flooring.