This item features a 0.69" screen, support text incoming call notification, pedometer and sleep monitoring.   Features: GENERAL DESIGN: Exquiste Workmanship, unique and beautiful design, lightweight and portable.  SMOOTH TOUCH and SWEAT-RESISTANT: Silk Smooth and soft touch on the surface, extreme comfortable grip feeling, anti-dirt, and anti-scratch.  SIMPLE OPERATION: 0.69" display, simple operating system. Perfect view angles, easy control KEY, quick in reaction with high sensitivity.  EASY CONNECTION: BT 4.0. APP for Android 4.4, IOS7.0 or above.  MAIN FUNCTIONS: HEART RATE and PEDOMETER: Record heart rate and sport data from time to time; Anti-lost, Text and call notification, Alarm, sleep monitoring, etc.  COMPATIBILITY: for iPhone 6 6S 6 Plus 6S Plus 7 Plus Samsung S7 edge S8.  LONG ENDURANCE: low energy consumption, full charge for almost 7 days use & 20 days standby.  It's just general life waterproof, do not wear it when you swim or bath.   Specifications: Model: C3;  Color: Black, Rose, Purple, Blue(Optional);  Material: Plastic+Silicon;  Charge/Data Port: Specilaised USB charging port;  Display: 0.69" NON-touch screen;  BT Version: 4.0;  Battery Capacity: 40mAh;  (Theoretically Use/Standby Time: 7-20 days, Standby/Use time will depend on the actual using situation.);  Product Size: Approx. 22 * 2 * 2cm / 8.6 * 0.78 * 0.78in;  Product Weight Approx. 24g / 0.84oz;  Package Size Approx. 12 * 7 * 6cm / 4.68 * 2.73 * 2.14in;  Package Weight Approx. 73g / 2.55oz;   Note: Item color may show slight aberration due to different shooting light and monitor display.  It's just general life waterproof, do not wear it when you swim or bath, the Air pressure steam and may ruin the wristband.  Heart rate monitoring is influenced by various factors like tensions, drugs, etc.  Wrsitband language is digital number, easy to be understood.  Charging: Take the core off and charge directly, very convenient.   Package list: 1 * C3 Wristband;  1 * User Manual