High performance and accurate measurementComen ECG has high performance, Time constant≥5s,standvoltage≥±650mv, provide a strong guarantee for the accuratemeasurement Alphanumeric keyboardButtonlight for button Features 5.7 inch TFT color screenLead status indicationSimple & clear keyboard layout, back light supportInternal memory of 300 ECG recordsHigh accurate digital filter (EMG filter, AC filter, Drift filter, lowpass filter) 122 kinds of diagnosis report120 seconds ECG waveforms review and printSupport 210mm rolling, Z-folded paperUSB port for external printer connection & data transmissionPC-ECG management systemWorking mode: Auto, Manual, Rhythm