Body composition analyzers; medical body composition monitor; body fat measuring devices; body-fat monitors; body fat analyzers; body fat measuring devices for medical use; body mass index (BMI) measuring devices for medical use; wireless bio-signal measuring instruments for medical purposes; pulse measuring devices; heart rate measuring monitor for medical purposes; heart rate monitors; heart rate monitoring apparatus; heartbeat measuring apparatus; wireless heart rate monitor devices for medical use; medical health signal measuring instruments; portable body composition analyzer; walking pattern analyzers for medical purposes.;