Touch Screen Display Responsive Buttons Support Bluetooth Calling Straps: 7 interchangeable stylish straps Display: 1.9 inch Material: TPU, Silicone Connectivity: 5.0 Health & Sports Features: Heart Rate Monitoring Water Resistance: IPX4 (Safe from Daily Splashes) Battery Backup: Up to 1–3 Days (Depends on Use) Charging Method: Wireless Charging Supports Notifications: Facebook, WhatsApp, Twitter Compatibility: Android & iOS (App available) Special Function: Make and Receive Calls, Lighting, Calendar, Alarm Clock, Week, Month, Camera Remote, Music Control, Calculator App Control: Yes