Main functions Display mode: B, B/B,4B, B+M, and M Convex array: C80R60 Magnification: ×0.8, ×1.0, ×1.2 (Depth hoist display), and × 1.5?×1 .8, ×2.0 (Depth hoist display) Dynamic range: 64~96dB adjustable. Focusing: Four sections of dynamic electronic focusing may be elected. Pre-processes: changeable aperture, dynamic changes of the marks, dynamic filter and edge enhancement, etc. Pro-processes: 8 kind of ?adjustments,16 kinds of color process, line correlation, frame correlation and linear interpolation, etc. Frequency conversion: 2.5MHz/3.0MHz/3.5MHz/4.0MHz/6.5MHz/7MHz(Matching 6.5MHZ cavity probe and 7 MHz High-frequency linear array probe). Calculation: distance, perimeter, area, heart rate, pregnancy week (BPD, GS, CRL, FL, AC) and anticipated delivery date. Note: name, serial numbers of case history, gender, age, 16 body marks (with probe), full-screen character, real-time clock Puncture guide: The puncture guide line can be displayed under B mode. Gain control: The total gain, near field and far field can be adjusted successively. Image polarity: left/right, black/white and up/down reverse. Fractionated gain: 2 time of enlargements Movie memory: 256 pictures can be memorized successively when the real-time is displayed. Image memory: 128 pictures Permanent storage. Image review: Images can be reviewed successively and checked one by one. Output interface: 1 groups of SVGA video output may mate with SVGA color monitor. 1 groups of PAL video output may mate with PAL monitor, video image recording instrument and image workshop, etc. 1 group of USB Connection.