Fluke 85RF II High Frequency Probe, 0.25 - 30V rms Voltage Range, 500 MHz Frequency High frequency probe is designed to convert a DC voltmeter with a input impedance of 10 megaohms into a high frequency (100kHz to 500 MHz) RF voltmeter Conversion from AC to DC is accomplished on a one-to-one basis includes a range of 0.25 to 30V rms The probe's DC output is calibrated to be equivalent to the rms value of a sine wave input 0.25 to 30V rms voltage range 30V RMS, 200V DC maximum input voltage