... digital beamforming technology 2.Display modes:B,B+B,B+M,M,4B 3.Port:PAL-D video out,USB 2.0 Digital Ultrasound ... machine,3.5MHz convex probe,10'' VGA monitor·Optional accessories:Video recorder,linear probe with high-frequency(7.5 MHz).transvaginal probes ... :· Scanning mode: Convex,transvaginal,high-frequency linear· Display mode:B,B+B,B+M,M,4B·Detectable depth:≥190mm·Gray scale:256 levels ...