Excelvan Fitness Tracker Wristband Silent Alarm Sleep Monitor With Remote Capture And Calls Reminder Function For Android OS Apple IOS Blackberry OS Phones (Newest Version) Display healthy parameter This smart bracelet can show the time, steps, distance, calories and even monitor your sleep quality. You can deeply know yourself. Synchronize sport data When the Bluetooth 4.0 is paired, you can synchronize your data to your smart phone (Android must be 4.3 or above, IOS must above 6.0 )whenever and wherever. Adjustable wristband Wear you smart bracelet comfortably by adjusting you wristband yourself! Remind feature With this smart bracelet, you are never afraid of missing any infomation. Smart alarm You are not afraid your alarm would wake up others because This vibration function just wake YOU up.Remote capture You can take phones of your family without others help-Sleep monitoring Are you curios whether your sleep quality is good or not? Sleep monitoring function gives you the answer.