Model number: ECG-901(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 20X2 character LCD Paper size: 50mmX20/30m Built in RS232 interface (USB is optional)