Model number: ECG-901A (Single channel) 1,Single channel with measurement reportBuild in rechargeable Ni-MH batteryChinese/English languageSimultaneous 12 leads320X240 graphic LCD, 3.8 inch screen2,Paper size: 50mmX20/30m3,Built in RS232 interface (USB is optional)4,8 Patients save/copy/communication

5,Dimension:288mmX204mmX60mm   6,Packing:380mmX300mmX210mm   7,Weight:4.3kg(gross); 3.27kg(net)