... :Structure: portable and trolley, KJ-4001, 4002, 4003 and 4003(workstation)Display mode: Convex array: B, B/B,4B, B+M ... , dot correlation and linear interpolation, etc.Frequency conversion: 2.5MHz/3.0MHz/3.5MHz/4.0MHzCalculation: distance, perimeter, area, heart rate, pregnancy ... check intrauterine equipment, pregnancy and so on. B Ultrasound Scanner (Workstation)