exhibit 10. 1 october 1, 2021 millstone medical outsourcing, llc 580 commerce drive fall river, ma 02720 attn : karl neuberger cc : tom williams re : dynatronics – millstone medical master service agreement 90 - day termination mr. neuberger : dynatronics desires to terminate the master service agreement signed july 8, 2020 ( “ msa ” ). notwithstanding any other provisions of the msa, the parties agree that this letter shall serve as a 90 - day notice of said termination. dynatronics will exit millstone medical ’ s olive branch facility by december 31, 2021, after which, the msa will be cancelled, terminated, null and void. dynatronics agrees to continue to pay the monthly fees up to an including december 2021. per section 2c of the msa, dynatronics agrees to pay millstone december ’ s fees within thirty ( 30 ) business days of the date of termination, and for the amount of any services performed up to the date of termination. millstone agrees to continue service and aid in the transition to ensure a timely removal of dynatronics ’ products. signatures below acknowledge the mutual understanding of the transfer and exit as outlined above. dynatronics millstone medical outsourcing / s / john krier / s / karl neuberger its : president and ceo its : ceo date : october 1, 2021 date : october 6, 2021 dynatronics millstone medical outsourcing dynatronics dynatronics millstone medical outsourcing millstone medical outsourcing / s / john krier / s / karl neuberger / s / john krier / s / john krier / s / karl neuberger / s / karl neuberger its : president and ceo its : ceo its : president and ceo its : president and ceo its : ceo its : ceo date : october 1, 2021 date : october 6, 2021 date : october 1, 2021 date : october 1, 2021 date : october 6, 2021 date : october 6, 2021