... Detector with Easy-to-Read LCD Screen 3-in-1 Stud, Voltage and Metal Detector with ... Detects voltage up to 75mm depth Detects wood up to 18mm Auto calibration metal, voltage ... & design with one-stop ServiceContract manufacturing service applicable in industrial, automotive, computing, storage, consumer, instrumentation, ... feel free to contact us. 3-in-1 Stud, Voltage and Metal Detector, custom circuit ...