Model number: ECG-903 ( Three channel) Dimension:300mmX230mmX61mm Packing:375mmX295mmX195mm Weight:4.5kg(gross); 3.57kg(net) Three channel with interpretive Build in rechargeable Li battery Chinese/English language Simultaneous 12 leads 192X64 graphic LCD Paper size: 63mmX20/30m Built in RS232 interface (USB is optional) 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