Portable structure and it can be applied in the ... on; and the product performance is reliable.Technical Parameters:Structure: portable and trolley, KJ-4001, 4002, 4003 and 4003(workstation ... B mode.Gain control: The total gain, near field and far field can be adjusted continuously.Image polarity: left/right, ... applied to check intrauterine equipment, pregnancy and so on. Portable B ultrasound machine