The Sonin 4 in 1 Multi Function Detector is the perfect all around instrument. It can detect wood and metal studs, beams and joists behind walls up to deep. Detect moisture percentages 8-22%. Detect and locate hidden metal pipes and frames (both ferrous and nonferrous) behind walls up to 2 deep and locate water leaks to prevent wet rot. Non contact voltage detection helps locate and trace live AC wire behind walls and ceilings up to 2 deep. Easy to read LED display • Detect wood and metal studs, beams and joists behind walls up to deep • Locate and trace water leaks Locate and trace live AC wire behind walls and ceilings up to 2 deep