1. Digital Single channel ECG machine with measurement 2. 12-lead ECG simultaneous acquisition 3. Multiple operation modes: Manual/Auto/Arrhythmia Analysis Modes 4. Lead-off Indicator 5. Built in rechargeable Ni-MH battery 6. Adapt 110-230V, 50/60Hz AC power supply 7. ECG waveform, 20 patients save/replay (*only for ECG-1B) 8. Built in USB/RS232 interface (ECGNET software optional) 5KG/PCS, 20cmX33cmX39cm/CARTON