Digi24 Smart Watch: Premium Design: 1.7in Large color touch screen gives you a better visual experience. Lightweight, breathable, and skin-friendly straps enable comfortable wearing. Wearing a full screen protective cover, no longer have to worry about bumps and scratches. App Supported: "Da Fit" app. NOTE: Connect the watch with your smart phone in the "Da Fit" app, not in the Bluetooth settings of your phone. Download and install the free app "Da Fit" by scanning the QR code in the manual or searching the App Store. IP68 Waterproof: Sweat-proof, rain-proof, and splash-proof. You can wear it when running in rains or washing hands. Call/Text Messages Notification Steps: 1. Make sure Phone/Messaging/Call log permissions open when you first download the "Da Fit" app; 2. Please make sure that the "Da Fit" app notification is open in your phone's setting:Settings>Notifications>Da Fit>Allow Notifications; NOTE: Smart watch data cannot be used for medical purposes. The monitoring data is for reference only. If you need medical help, please contact a professional doctor. Specifications: Name: P25 APP Name: Da Fit Compatible System: Android4.4 (inclusive) or above, IOS8.0 inclusive) or above Screen Type: HD touch screen Strap material: Silicone Charging Time: 2.5 hours Usage time: 1 Week Size: HD/1.7inch Charging method: Magnetic charging Weight: 46g What in Box？ 1 x chalvh Smartwatch 1 x Charging cable 1 x User Manual 1 x Smart watch protective case