CE Mark and ISO certificate ,clear image,good quality and favourable price Technical Parameters: 1. Five display format: B,B+B,4B,B+M,M; Image grey scale: 256 levels 2. Freezing, real time, selective enlargement, upwards/downwards and left/right turnover of the image can be realized3. 8 stage TGC adjustment; 18 types of body mark ;Software reset function4. Full-screen character annotation; .Fixed character, real time clock and calendar5. Electron focusing, free combination of focus6. Various probe for choice, enough to meet requirement of clinical diagnosis7. Frequency Conversion: 2.5MHz ,3.5MHz ,4.5MHz ,5.0MHz, 5.5MHz, 6.5MHz, 7.5MHz, 8.5MHz10.0MHz8. Image magnification: ×1.0,×1.2,×1.5,×2.0.9. Measuring: distance, perimeter, area, volume, pregnant weeks (BPD,GS,CRL,FL,AC,HC)etc. heart rate and slope can be measured under M mode10. Permanent function of image store: 8 images11. Built-in DSTN Processor, PAL-D and VGA video transmission, external screen monitor, colorful screen, video tape recorder, video image printer ,laser printer etc.12. USB Function of image store: more than thousands of images