Is HAELO considered low or high frequency EMF?

HAELO is considered low voltage and low-frequency EMF, operating within the Extremely Low Frequency (ELF) and Very Low Frequency (VLF) frequency ranges.

Here is a diagram of the electromagnetic spectrum, showing various properties across the range of frequencies and wavelengths:

(source: Wikipedia,  Inductiveload, NASA, CC BY-SA 3.0, via Wikimedia Commons)