- The watch's silicone bracelet is both stylish, functional and makes the watch very comfortable to wear, throughout the day. Interchangeable Strap- The watch has a large amount of features and is IP67 rated. and only supports daily hand washing, sweating or splashing of rain, etc. Not recommended for swimming. - With the watch, you can also monitor your sleep and gain insights into your sleep habits and sleep quality. - Compatibility Android, IOS Usage time: About 5 daysWaterproof class: IP68 Charging method: Magnetic charging cable Product fit: CO-FIT Main Display: 1.43 inches Resolution: IPS 466*466 Weight: 42.1g Battery Capacity: 260mAh Internal Memory Flash: 32MB Applicable Platforms: Android 4.4 or later IOS 9.0 or later Material: Zinc Alloy + Tempered Glass Standby Time: About 30 days Charging Time: About 1H40 min Functionality: Large number of calls to receive, send pictures, call menu, sports record, activities, calls, contacts, heart rate, stress, sleep, stock, call waiting, settings, Calculator, themes, calendar and more