Comen CM 300 -- 3 Channel ECG Machine Features: High resolution LCD screen 320 x 240, vivid waveform display 12 leads ECG simultaneous acquisition Built- in high-resolution thermal paper Built-in rechargeable Li- ion battery, AC/ DC power supply Anti- defibrillation and Pace- maker detection Complete digital filtering, resisting baseline drift. Automatic baseline adjustment Automatic ECG measurement and interpretation Large patient data storage: 150 ECGs, USB for data transfer to PC Three printing formats ( Auto, Manual and Rhythm) selectable 1/2/3 channel ECG waveform and rhythm leads record out Lead status diagram display