1. Large LCD display,ISE direct measure-methold,very easily operate by touching two keys:yes or No 2. Adopt automatic tracking software, so automatically display failure. 3. Automatic selection, automatic calibration, fast test-analysis in 25s. 4. Fully closed reagent pipeline, so avoid any contamination 5. Automatic maintenance ,auomatic cleaning,automatic calibrate 5 measurement data &slope &average discrepancy.