... Auto/Arrhythmia Analysis Modes. ECG-1B 1. Features: One channel digital ECG machine with interpretation Simultaneous acquisition of 12-lead ECG ... graphic, 3.8 inch LCD High resolution thermal printing system High resolution digital filter Built-in USB or RS232, optional PC-ECG ... ≤20μVSensitivityAuto 2.5, 5, 10, 20, 40mm/mVRecording system High resolution thermal printerPaper speed 25, 50mm/s±3%Recording ...