Compact, Portable, Light Weight & One Touch Operation. Simultaneously acquisition of 12 lead ECG data. LCD Display of Operating Menu Lead-Off Indicator Rhythm lead for observing abnormal ECG waveform & heart rate available. Built-in thermal printer 50 mm. Manual/Auto/Arrhythmia Analysis Mode AC and DC power Supply IEC Class 1, Type CF Safety Standard High Frequency Response upto 150 Hz Battery back-up upto 4 Hours Available. Filters: AC, EMG, DFT Interference Copy Facility Available Self-test upon powering on. Built in RS 232 interface (ECGNET Software Optional).