Simultaneously acquisition of 12-lead ECG data, IEC Class I, type CF safety standard High resolution thermal printing array system Operation menu and parameter setting via LCD Selectable three modes of leads: Manual (standard single channel), Auto I (standard single channel) & Auto II (standard single channel plus rhythm lead) Memory for storing ECG data for later printing Measurement function under Auto Mode operation Filter for AC, EMG and DFT Hidden holder for easy carriage. Function of heart rate detection and protection against possible pulse shock while pacemaker applied Real time clock, heart rate examination Option: USB&RS232 interface & software(12-lead ECG waveform can be transferred to PC, measured, analyzed, stored or printed out on A4 paper)