AWOW Smartwatches Fitness Tracker with cellphone Watch Mobile Phone Heart Rate Monitor Blue It's a functional smartwatch based on android 4.4.4. Complete with a multitude of apps like calculator, pedometer, alarm clocks, sleep monitor, music player, camera, calendar, push notification, remote control, NFC and different theme. As a functional smart watch, the device can connect to your phone via Bluetooth and can be used to answer calls, respond to texts, set alarms, and tell time. Anti-lost alarm function: When cellphone left, watch alarm automatically, after a certain distance to avoid lose the phones Heart rate (HR) is an excellent measure of exercise and your training intensity. In the human body heart rate is regulated to match the demands of the body and the environment. When exercise intensity increases, heart rate also increases to match the increased rate of energy expenditure and oxygen uptake. With AWOW smart watch, your heart rate could be checked at any time and show result in fast. Buy with confident: Items shipped from Amazon and can be returned within 30 days