Philips Norelco Body Groomer

if I put the harness on the trim and put it to 5, do I buzz my head, and it works ok?

You can buzz your hair this way but it will be uneven. If you plan on keeping your hair that way you can spend some $ $ on him because you do not cut hair. I recommend either clippers Wahl Sterling. They are available at Walmart and Sally's beauty supply. Remember to keep them well oiled. I hope this will help. Good Luck!