Model number: ECG-901A (Single channel) Dimension:288mmX204mmX60mm Packing:380mmX300mmX210mm Weight:4.3kg(gross); 3.27kg(net) Single channel with measurement report Build in rechargeable Ni-MH battery Chinese/English language Simultaneous 12 leads 320X240 graphic LCD, 3.8 inch screen Paper size: 50mmX20/30m Built in RS232 interface (USB is optional) 8 Patients save/copy/communication