Digital Radiation Detector Dosimeter Geiger Counter Electromagnetic Tester
1 x Electromagnetic Radiation Tester. 3-7 Layers Acrylic Collector Card Display Stand Rack Shelf For Trading Cards. Alarm threshold: Electric field: 40V/m Magnetic field: 0.4μT. Unit: Electric Field: V/m Magnetic Field: μT Temperature: ° C/° F.