Do headphones give mghz?

Do cheap wire headphones NOT WIRELESS connected to my iPhone give any sort of mghz or stimulation harmful effects.

No speaker "give" megahertz, normal human ear can hear 30 hz to upwards 19-20 khz

No.

They are limited to audio frequencies,
and their electromagnetic field strength is extremely low.

Most of the energy that goes into them is converted to heat,
and the rest is converted to sound.

"Give mghz" is completely meaningless. If you are asking about harmful radiation, the answer is no. When did they quit teaching science in school?

A megahertz is a certain number of hertz, a million Hertz, and that number represents vibrations fast enough to be considered radio waves, speakers do not broadcast radio waves.Air vibrations per second that define particular audible tones, or musical notes fall in the frequency range of 20 Hz to 20,000 Hz (20KHz). All speakers of any kind exist to produce these frequency vibrations which taken together we call music. Wire is not a broadcast medium, Your wireless ear wear though, does receive transmitted radio waves in the Megahertz frequency range.