FRANKLIN SENSORS has built its reputation on professional-grade stud finders that give you accurate readings. The ProSensor M150 doesn’t waste your time with calibration procedures or inaccurate readings. Just press the button and scan to find studs instantly. The handy LED display shows the center and edges of studs. The M150 has live electrical warning lighting two amber lights if live electricity is detected. The M150 is the first Stud Finder to use FRANKLIN SENSORS enhanced precision LED display which adds even more accuracy.