Features: 3/4(3-6)/6 channel printout format 5.1 inch 320 240 LCD to display ECG waveform, setting menu and operating status Rhythm lead with R-R interval histogram and trend graph Automatic measurement and interpretation of standard ECG parameters Seamless communication with HIS firmat of JPG, PDF, ect Optional ECG viewer software for futhuer data management Paper size: 112mm 20m, roll type