very cheap and great quality 4D doppler ultrasound machine

Specifications

Specifications:
1. Imaging Modes:
B, B|B, 4B, B|M, M
Color Doppler (CFM)
Power Doppler (PDI)
Directional Power Doppler (DPDI)
Pulsed Wave Doppler (PWD)
B+PWD (Duplex)
B+CFM/PDI/DPDI+PWD (Triplex)
High Pulse Repetition Frequency (HPRF)
Tissue Harmonic Imaging (THI)
2. Scanning Method: electronic linear, electronic convex, electronic micro-convex, scanning depth: 2-24cm
3. Color Doppler:
PRF variable: 0.5-9 kHz
wall filter settings: 3 steps (5%, %10%, 15% PRF)
angle steering for linear transducers: ±10°
real-time spatial filter: 4 values
CFM palette>10 maps
PDI palette>10 maps
B/Color priority control
color threshold control
CFM baseline control
Doppler frequency selection
color frame averaging
Transparent Color Mapping (TCM)
4. Pulsed Wave Doppler:
PRF variable: 1-10 kHz
wall filter settings: 16 steps (2.5%-20% PRF)
angle steering for linear transducers: ±10°
real-time trace line with automatic calculation of spectrum parameters
stereo sound: volume control
PWD palette>10 maps
Doppler frequency selection
5.Processing:
High Line Density scan mode for better resolution
8 sliders TGC Control
dynamic range>120 dB
overall gain control
M - mode sweep speed control
acoustic power control
variable frame averaging
brightness, contrast
advanced gamma control
scan direction, rotation, up-down controls
negative / positive control
echo enhancement control
noise rejection function
speckle reduction
6. Image and video: AVI, JPG, BMP, PNG, TIF, DCM (DICOM)
7. General Measurements and Calculations: Distance, Length, Area, Circumference, Volume, Angle, Stenosis %, A/B Ratio, Velocity, Pressure Gradient (PG), Acceleration, Resistivity Index (RI), Heart Rate, Velocity Time Integral (VTI), etc.
8. Measurements and Calculations Software Packages: Obstetrics, Gynecology, Abdominal, Urology, Endocrinology, Vascular, Cardiology, etc.
9. Expansion interfaces:
VGA, TV Interface
USB2.0 Interface
RJ-45 Network interface
Support DeskJet printer, LaserJet printer, video printer

Standard Configuration:
Host 1 unit; Convex probe 1 pcs; Lienar or Trans-vaginal probe 1 pcs

Optional: 
Linear, Trans-vaginal, Micro-convex, Rectal probe; 3D imaging software; Bag; Trolley; Laser Printer; Video Printer