Simultaneously acquisition of 12-lead ECG data, IEC Class I, type CF safety standard Selectable four modes of leads: Manual (standard single channel), Auto I (standard three channel), Auto II (standard single channel plus any rhythm lead) and Auto III (European three channel) Function of ECG parameters measurement and distinguish point printing under Auto mode LCD display of operation menu, AMP menu and parameter setting Powerful filter for AC, EMG and DFT interference High resolution thermal printer AC and DC power supply, rechargeable built-in battery, about 2 hours? working time High resolution and multiple print formats ensure best print quality of ECG waveforms Capability of input & output for analog signal RS232 interface ensure easy convey of ECG Option: USB interface, net-working capacity