EIISON Fitness Tracker with Heart Rate monitor E3S Activity Watch Step Walking Sleep Counter Wireless Wristband Pedometer Exercise Tracking Sweatproof Sports Bracelet for Android and iOS ACTIVITY TRACKING - Track workout, heart rate, distance, calories burned, active minutes and steps. Heart Rate Monitor --- Continues HR monitor, strap-free heart rate monitoring. A simple way to start with heart. 0.49 inch OLED Screen Display --- Mini vibration alerts motor, See stats and time with a bright OLED tap display Very comfortable to wear as it is made almost entirely out of silicone and is very smooth Sleep Monitor --- Auto sleep monitoring, accurate analysis of the sleeping quality , make you have a better understanding of the effects of sleep.