Warm Tips You can download the User Guide and User Manual to get beter use on the part of the listing Product guides and documents. If you have any questions, please let me know via Your Account-Your Order-Click the order. Previous page Next page 1 Split-screen Design 2 Functional Crown 3 To Get Better Readings Previous page Next page 1 Blood Pressure 2 Heart Rate 3 Blood Oxygen 4 Sleep Tracking 5 Record Your Period Previous page Next page 1 Call & Message Reminder 2 110+ Sports Modes 3 DIY Your Watch Faces 4 Flashlight 5 Humanized Design Previous page Next page Long Battery Life The smartwatch can be on standby for up to 15 days and used for up to 5 days with only a 2-hour charge (Battery life varies with use & other factors). Variety Colors to Choose The silicone strap is skin-friendly and light. The width of straps is 20mm.