MC161 provides nearly flat output voltage response over a very wide frequency range of magnetic field: 2 - 200 kHz, then declines gradually and smoothly 200-500 kHz.  

Above 500 kHz the MC161 output can be very non-uniform so it's not recommended above 500 kHz.

NIST traceable calibration data table is tested and delivered with each sensor, from 0.5 kHz to 999 kHz.  

Output voltage is 1 mV per milliGauss field over the flat response frequency range.  

Output voltage from the sensor is same frequency as magnetic field frequency.

The sensors are not calibrated above 1 MHz and may produce an output RF voltage when receiving some magnetic field frequencies above 1 MHz.