Technical Specs
1. Probe: Electronic convex array, linear array
2. Scanning angle: convex probe 60°, intra-vaginal probe 120°
3. Frequency: 5.0-9.0 MHz
4. Display Mode: B, B/B, 4B, B/M, M
5. Gray Scales: 256
6. Monitor: 10' black & white display
7. Body Marks: 64 marks
8. Channels: >=16channels digital beaming composite
9. Resolution: horizontal<=3mm, vertical<=2mm
10. Dead zone: <=5mm
11. Max scanning depth: >=17cm
12. Geometry position precision: Transversal<=10% Longitudinal<=10%
13. Magnification: 8 kinds
14. Gain: 0~127dB
15. Dynamic scope: 27~100dB, visible & adjustable, Four different angles / switchable width
16. Imaging technique: full digital beam-composite, continuous dynamic focusing, dynamic aperture
17. Image storage: 100 frames permanent storage
18. Cine loop: 256 frames
19. TGC: TGC control, far field / near field
20. Image processing: pre-process (continuous dynamic focus, dynamic aperture, dynamic filter), post-process（4 grades gamma correction)frame correlation, black/white reversal, left/right reversal, up/down reversal, edge enhancement, etc.
21. Frame frequency: 30 frames/s
22. General measurement: distance, circumference, area, volume, heart rate, GA, fetus weight, EDD, etc.
23. OB tables: BPD,CRL, GS, FL, HL, LV, TBD, APBD, HC, AC
24. Character Display: name, age, gender, hospital name, time, date, probe mode, frequency, focus, frame correlation, gain, contract, etc.
25. Puncture guide line: with two approvable guiding lines whose angle and position can be adjustable.
26. USB software: USB for image transfer(optional software of case report process center)
27. Video Output: PAL / NTSC
28. Power supply: 110 / 220 V + 10%, 50 MHz + 2% 
