DT58 Smart Bracelet Band Heart Rate Monitor ECG Blood Pressure IP68 Fitness Tracker Wrisatband BlueKey Features...Function:Heart rate, Heart rate variability (HRV), Blood pressure, Respiratory guidance, Step, Sleep monitoring, Alarm reninder, Various clock faces replacement available from App, Altitude, Ultraviolet light, Air pressure, Weather (push through the network)Multiple sports modes: walki..