... built-in flash memoryLCD display: ECG waveform and lead numberDimension: 80mmx45mmx18mmWeight: 75 grams (battery not included)Lead: 10 wire patient cable (I, II, III, aVR ... cable (I, II, III, aVR, aVL, aVF, V1~V6)Power: 2 AA size battery Newest Version 12-channel ECG Holter System/Recorder Monitor ...