... clip 4) ISO 9001:2008 B-Ultrasound Unit The Features of B-Ultrasound Unit:Portable and attractive plastic injection design: small-sized ... , M and 4BProbe Frequency: 2.5MHZ--7.5MHZScan Mode: Convex,Electronic LinearMeasurement: Distance, Circumference, Area, Heart rate, EF slope, GS, BPD ... and weight.Dual direction 192 frame cine loop B-Ultrasound Unit