Already own a radio that you need to have the MARSCAP mod applied to? We can take care of that for you. When you purchase this item and we will reach out directly to coordinate shipping and other details. Return shipping for handheld radios is included. Additional fees for return shipping will apply for mobile radios due to increased size and weight. Radios included are Yaesu VX6R, Yaesu FT60, Yaesu FTM-6000, and Yaesu FTM-300DR. Please contact us for any other models.