... metal tester (NAP7800) Precision metal tester Detailed Product Description1.Display screen 2.Anti-radiation, Weight: 50Kg 3.Analysis: Au ,Ag ,pt ... .0.001,X-ray ligh 0.001g X-ray light Computer Screen Spectrometer for 1%-99.99% NAP7800 upgrads the display ... screen and the circuit ,no need to connect with an external computer; professional fashion design with multi ...