Model number: ECG-9012 (Twelve channel) Dimension:376mmX300mmX96mm Packing:455mmX380mmX260mm Weight:7.5kg(gross); 4kg(net) Twelve channel with interpretive Build in rechargeable Li battery Chinese/English language Simultaneous 12 leads 320X240 graphic LCD, 5.7 inch screen Paper size: 216mmX20/30m Built in RS232 interface (USB is optional) 128 patients save/copy/communication