With floating function the measurement is safe and accurate Frequencyrange 10...With floating function the measurement is safe and accurate Frequency range 10Hz-2MHz sine wave effective power supply voltage decibel range -80dB-50dB) (1dB=1V) decibel range -77dBm = 52dBm (0dBm = 1mW 600) Measuring range 3 millivolts 30...more