A ELETRO CM300 is an electrocardiograph with 12 standard leads, acquisition mode of 12 simultaneous leads and EMG, DFT, Low-Pass, AC filters. It has a rechargeable internal battery with a duration of 2 hours of continuous use, thermal printer, 80 mm roll paper, 3 channels and paper speed of 5mm/s, 10mm/s, 25mm/s, 50mm/s.