1.favourable price 2.specific obstetric design 3.stable system 4.full digital technology platform SpecificationScanning Depth: 190mmDisplay Mode: B,B+B,M,B+MMagnification: ×1.0 ×1.2 ×1.5 ×2.0Function: distance,circumference,area,heart rate,gestationVideo Out: connecting video display and printerBattery Capacity: 2200mAhConsumption: 25W ApplicationClinical diagnosis on abdominal organ (such as ...