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 Standard Accessories : 1. patient cable 1 pcs 2. limb electrodes 4 pcs 3. chest electrodes 6 pcs 4. 3-cord power cord 1 pc 5. grounding cable 1 pc 6. thermal paper 1 roll 7. fuse 2 pcs