... TGC ABD Trackball adjustment 10 inch VGA monitor Full digital Portable Laptop Ultrasound Scanner WK/21355Main Features: Powerful measurement & calculation ... inch VGA monitorOB measurements: BPD, GS, CRL, FL, AC, HC, etcPermanent function of image store: 32 imagesBack-lit ... Volume, Angle, Ellipse;Obstetrics menu: GS, CRL, BPD, HC, AC, FL, Fetus Weight;Heart menu: Distance, Time, Slope, Rhythm;Standard ...