Features:Low-power chips, real-time heart rate detection, real-time detection of blood pressure, healthy sports style, can link IOS Andrews mobile phone to share health data packets, with the font can be synchronized display call numbers and information tips. Straps can be disassembled.The main function:Sports time, exercise cardway, health sharing (through the APP implementation, friends circle) movement target settings, real-time heart rate detection, real-time blood pressure detection, sleep reminders, sedentary reminders, alarm clock reminders. Low power chip, healthy sports style, can link IOS Andrews mobile phone to share health data packets, IP67 waterproof design.bluetooth function:IOS Andrew sync via SMS, phone book, caller. (Bracelet built-in and no phone book, after the connection through the bluetooth connection can display the phone's phone name) with the font support this feature.Supported languages:Chinese, English, Japanese, Korean, German, Russian, Spanish, Italian, French, VietnameseM4 Manual download https://drive.google.com/open?id=0B6iMR-BFq92PYnBTQ2gxUXpyQkkParcels include:1X smart band