... for upgrade.Dismountable battery.Connect with Jet printer, Laser printer to print directly.Other performance is as the same as the laptop ... and calculating fetus’ weight, pregnancy week, fetal physiological rating according to the previous measurements.Cardiac measurement software. The measurement result could ... gamma curveTransducer frequency2.5-8.5 MHzMagnification×0.8, ×0.9, ×1.0,×1.1,×1.2,×1.3, ×1. ...