the best quality,the most competitive price Three channel ECG machine-----------------------------------------------Key Features -----------------------------------------------3 channel with interpretationManual/Auto/Arrhymia Analysis Modes 80mm 3-ch ... -Ioin batteryAdapte 110-230V, 50/60Hz AC power supplyReal-time ECG waveform, 16 patients save/replayBuilt in USB/RS232 interface(ECGNET ...