Simultaneous 12 leads ECG acquisition and display Simultaneous 3 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 recise 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 Network transmission Software upgrade automatically via SD card . Package Size:380mm*330mm*230mm Package Weight:4.1Kg.