Polar Hear Rate Monitor FT60M Black w White Display Male B P Parts Accessories output level ≤120±3dB Max OSPL90 Paper Towels output level ≤120±3dB Max OSPL90 ≤120±3dB Average OSPL90 113±3 dB Max Gain 29±5dB FOG50 HFA Avg 5V Otoscope also has built in throat illuminator two in one instrument * Features halogen illumination and fiber optics for a cool light with no reflections or obstructions plus a rectangular viewing lens for instrumentation under magnification * 2 With the Polar Fitness Test you can measure your aerobic fitness by yourself automatically and without any exertion See also Maximal oxygen uptake (VO2max) and Manual target zone * Average and maximum heart rate of training * Heart rate : bpm % * Heart rate is the measurement of the work your heart does