VERTTEE Smart Bracelet Fitness Tracker Heart Rate Monitor Bluetooth 4.0 Sport Waterproof Pedometer Monitor Monitor incoming calls, caller ID, time and date, daily stats with vibration alerts, automatically light up when you turn over hand With OLED screen display, vibration alerts motor, bluetooth version: 4.0 Track steps, heart rate, distance, calories burned, active minutes Continues HR monitor, strap-free heart rate tracker. A simple way to start with heart Compatibility with Android 4.4 or later, IOS 7.1 or later, download APP "HPlus Watch" from Apple Store or Google Play. (smart phone and tablet only, not for PC)