l 4.3inch 480*272 color display;80mm*20m roll type thermal paper l 12-lead ECG simultaneous acquisition and display on the ECG screen l Multiple Operation models: Manual/Auto/Rhythm analysis l 3-lead recording with a rhythm lead l Digital filters to eliminate EMG/AC interference and prevent baseline drift. l Lead-off detection l Built-in rechargeable 1800mAh Li-ion battery, 2 hours continuous working l 110-230V,50/60Hz AC power supply l 200 patient reports save/replay l Built-in USB/RS232 interface..