... : MD-5008 Power: DC12V Signal frequency: 7kHz Gold Metal Detector MD5008 : Main features: 1,a balance between the lines, to ... light weight, long life 4, can be identified through headphones sound of metal products parameters: 5,maximum depth of exploration: small ... voice alarm and instrumentation, with the probing depth exploration of metal the size, shape, weight, have great relations, in general, ...