... 0M Hz/3.5M Hz/4.0MHz etc. Multi-frequency selectedMeasurement: distansce, circumference/acreage, HR, pregnancy week ... resolution moniter80 elements R60,3.5MHz multi-frequency convex probeOPTIONALHigh frequency linear probe, electronic transvaginal probe, rectal ... probe, vidco thermal recorder, ultrasound image working station, etc. XF-2000 ...