... ECG Name:Digital Twelve Channel ECG Features:^12 Leads ECG simultaneous acquisition, simultaneous display of 3/6/12 leads ECG waveform^ ... interface^Multiform printing modes and format: Auto/Manual, standard 12 Ch, 3Ch+3R,6Ch,6Ch+1R and 60s arrhythmia ... SD CardSpecifications:^Input way: Floating and defibrilation protection^Lead: Standard 12 leads^Input impedance: ≥50ΜΩ ^Frequency response: 0.05Hz~ ...