Smart Watch Key Features: Fitness Tracker-with Full Touch, easycontrol with the sensitive touch screen Multi Healthy track modes : Step count,sleep, heart rate, blood pressure, oxygen saturation Stylish Watch for Men /Women/Kids:Support 3 clock faces to choose from Dial selection Sleep Monitor Watch: Automaticallymonitor and analyze sleep quality Super long endurance standby, 25 daysstandby, 5-7 days normal use.2.5 hours full charge Sleep monitoring, exercise mode, callreminder, alarm clock reminder, turn the wrist bright screen Wrist Strap Size:6.1 inch to 9.2 inch,adjust the band length to suit for forman woman kids' wrist Product Parameter: Screen: 1.4" TFT Full screen touch screen-240rgb*240 pixels Waterproof Level: IP67 Battery type : 170mAh Lithium polymer Charging mode :Charging clip Charge Time:2.5 hours Life Time:5-7 days of use, 25 days ofstandby Materials Body: Plastic + Aluminum Alloy Wristband: Silicone + Stainless Steel App Name: Da Fit，Scan the QR code APP Compatible system: Android5.1(contain), IOS8.0 （contain) above (Smartphone only, not for PC, iPad or Tablet)