RODE Microphones VideoMic Pro - Manual (Page 15)

15
High Pass Filter
The High Pass Filter (HPF) is a low frequency cut-off setting,
which you can use to reduce rumble and other low frequency noise
picked up by the microphone while recording. For more information
about HPF and when it should be used, see the feature on page 18.
To turn on the High Pass Filter, slide the power switch to the right
hand position until it is pointing to where the HPF (
) symbol is
indicated.
LED power indicator
The power indicator LED flashes red briefly when the microphone
is first turned on. This changes to green indicating the battery has
adequate charge. When the battery runs low the LED will remain
red and you should replace the battery. The microphone will
work for over ten hours once the red indicator is lit, however with
reduced performance. We recommend changing the battery as
soon as possible after the LED has turned red.