... . 3.distansce,circumference/acreage 4.HR,pregnancy week FEATURESImage mode: B, B/B, 4B, B+M, MImage magnification: *0.8 , *1.0 , *1.2 ... annotation, real time clock display.Puncture icad: Image B: Puncture guide line under B modeGain adjustmcnt: 8-segments TGC adjustment, GAIN adjustment ... probe, vidco thermal recorder, ultrasound image working station, etc. YM-218 Digital Portable Ultrasound Scanner