Bosch Wall and Floor Detection Scanner D-TECT 120 SMART TECHNOLOGY: The Bosch D-Tect 120 Wall and Floor Detection Scanner features Spot Detection technology to accurately detect objects behind walls, floors, and panels. ACCURACY: The D-Tect 120 never requires calibration so you can always feel confident with your reads and focus on the task at hand. VERSATILITY: The detection scanner can identify objects in any direction. The D-Tect 120 offers three modes: drywall, universal, and concrete so you can detect anything in anything. EASY-TO-USE: The wall and floor scanner is easy to use with its traffic light system: Green, nothing detected; orange, something is close; red, object detected. PRECISION: Not only does the D-Tect 120 show you directly detected objects but also shows the direction of nearby objects with arrows.