Ecg machine, ekg machine: simultaneous 12 leads ecg acquisition and display; simultaneous 6 leads ecg printing with 80mm thermal paper; 7 inch 800 x 480 tft color lcd; alpha-numeric keyboard; built-in rechargeable lithium battery (print up to 1080 ecg reports); built-in 4g sd card, save up to 10,000 ecg reports in xml format; pacemaker detection & precise ecg auto-interpretation program; usb slave port can be connected to pc-ecg software & usb master port can be connected to an external usb printer supporting pcl6 language.