It does plug into the wall but you can also buy a battery pack or car adapter. My son is 12 and uses the mouth piece that comes with the unit not a mask. After seeing my unit, my friend ordered one for her 2 year old grandson. She ordered the extra child size aerosol mask for $9.95. You can take out the med cup/mouthpiece unit and use a regular tubing (with the med cup) and a mask.
Hope this helps. Any more questions, let me know.
Hope this helps. Any more questions, let me know.