12-Channel ECG Model: ECG-9012A Feature: 1)Twelve channel with interpretive 2)Build in rechargeable Li battery 3)Chinese/English language 4)Simultaneous 12 leads 5)320X240 graphic LCD, 10.04 inch screen 6)Paper size: 216mmX20/30m 7)Built in RS232 interface (USB is optional) 8)128 patients save/copy/communication