1.Portable 12 channel ECG machine 2.Alphabetic keyboard for patient ... IEC Class I, Type CFSpecifications: Portable 12 channel ECG machineManual/Auto/Arrhythmia Analysis ModesAlphabetic keyboard for patient informationBuilt ... 110-230V, 50/60HZ AC power supplyReal-time ECG waveform, cases save/replayBuilt in USB/RS232 interface ... graphic 5.7inch LCD, 16cases save/replay ECG-12A Digital Electrocardiograph