OCATO H310 Smart Heart Rate Monitor Sensor Bluetooth Technology for Running Gym Cycling Outdoors Sports(Oval, Adjust) Tracks Heart Rate in Real-time.Please install relate fitness APP with your smart phone(micoachRunkeeperWahoo FitnessDigifitibikerRuntastic ProEndomondoMap My RideCyclemeter GPS....etc.), Then you could track your heart rate, can be Connected to Smart Phone and GPS Watch Compatible with most Apps Provides Live,Accurate Heart Rate to compatible Mobile Training Apps Compatible with iPhone, iPad, iPod Nano, iPod touch and Android Smartphone