SMA - TIME Bluetooth SmartWatches Sports Waterproof Sleep Heart Rate Tracker Wristband Stopwatch Smart Watch for Android & IOS
 
Main Features: 
-  Heart Rate Monitor 
Dynamic heart rate, it can also support 7 x 24 hours monitor, concern your heart rate state at any time 
-  Multiple Watch Interfaces 
Choose what you like, have a good mood 
-  Long Standby Time 
180mAh big capacity battery, it can support 40 days standby time, durable to use 
-  1.28 inch LCD screen