Measurement range of 200 MHz8 GHz, true response detection range 400MHz7.2GHz 6dB Accuracy 6dB performance tested in a 3rd party certified RF testing lab. Individually calibrated QC inspected Sound signature analysis for source identification 3 vol levels, Sound OnOff Low EMF emissions 4 line OLED Display Sensitive to 0.001Wm, made for the EHS persons Now featuring 2 options Vm or Wm Measure under any environmental conditions Power Response linearization in 3rd party certified RF test lab Measures low b mid b 5G cellular signals Measures densities up to 3,180,000 Wm down to 0.005 Wm Linear response 0.1Wm1,000,000Wm Max Hold w option to clear Bar graph of RF intensity USB Micro Power Jack Adjustable Vol Control, 3.5mm headphone jack Bat display Made in North America