Raymond,
please see
http://www.futaba-rc.com/manuals/index.html
Please make sure your radio is current and legal to use:
Please visit:
http://www.futabarc.com/faq/service-faq.html#q41
If your radio is NOT legal to use, please contact me directly (
[email protected]), as I am in need of a 4FG for our old Futaba product archive and would be willing to work out a trade for a legal radio for your grandson.