The Inner Balance Trainer is optimized to ensure accurate HRV and Coherence measurement.Medical grade photodetector125hz sample rate - measures your heart rate 125 times a secondAuto gain control capable of changing resolution of measurement in real timeState of the art, ultra-low Bluetooth working at an output power range of 0.5 mW or less, which is significantly lower than mobile phones80 hours of battery life, display of battery level in app and auto-shutoffErgonomic shape for easy placement with a low profile, lightweight designUSB charging cable included
