Records symptoms such as palpitations on the spot. Displays electrocardiogram waveforms that can be used by doctors for diagnosis. Electrocardiograph for home use. Brand name / Portable electrocardiograph HCG-801 Body weight / approx. 130g (excluding battery) External dimensions / 121(W)×67(H)×24mm(D) Power supply / 2 AAA alkaline batteries Induction method / bipolar 1 lead Heart rate count range / 2-200 beats/min