... preset: System preset includes parameter presets of OB, GYN, vascular, cardiac, urology and small parts, comments, manufacture default settings, system upgrade ... 1Convex Probe 1USB cable 1Power cable 1*Options:a) Transducers:Convex: R50, 2-5MHz, central frequency 3.5 MHz ;R60, 2-5MHz, central frequency 3.5MHz ...