Activity Monitors features: Chronus Smartwatch Heart Rate Monitor Blood Pressure Sleep Monitor Compatible Android iOS(Gray) Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. (A Must for Daily Sports) Has 7 sports modes (walk, run, bike, jump rope, badminton, basketball, football). It can also track your activities like steps, calories, distance, and daily active minutes, allowing you to train in a more scientific way. (Health Monitor) Always pay attention to your physical and mental health, monitor your heart rate, blood pressure, blood oxygen and your sleep. Please note that the data is only used for reference purposes. (Personalize Your Watch) Supports custom wallpaper, you can upload favorite photo. Weather forecast ， you can set your usual residence to check the weather on the “HeroBandIII” App. (Smart Notification) Messages and calls will be well informed. Raise your wrist, and the screen automatically turns on so you can check the incoming message. You can also control the music from your cell phone. (Compatibility and other Features) Compatible with iOS 9.0 / Android OS 4.4 or later smartphones. There are also more functions: Alarm, Stopwatch, Remote photo and Brightness adjustment, etc.