Smartwatch Android iPhone Compatible ★ The following straps are included: ・Metal strap (black) System Requirements: Android 5.0+ / iOS 10.0+ Master Chip: JL7011 Bracelet Memory: 128M Bluetooth Calling: Supported Bluetooth Version: 5.3 Screen Display: 1.32 inches Display Screen: 128*160 Battery Capacity: 280mAh Standby Time: Approximately 7 days Usage Time: Approximately 3-5 days Compatible Devices: Android 4.4, iOS 8.0 Bluetooth 4.0 ◎ Main Functions Call function, steps, sleep, exercise, heart rate, blood pressure, blood oxygen, weather, music, breathing, messages, timer, etc. ◎ New Features Built-in speaker & high-performance microphone, allowing calls without taking out your phone. ◎ Numerous Exercise Modes Equipped with many sports modes such as running, walking, and cycling. By connecting to the app, you can measure data such as exercise distance, time, and calorie consumption. ◎ Large Screen & Customizable Watch Faces 1.32-inch large screen. 10 built-in watch faces, and you can download watch faces through the dedicated app. ※ Contents Smartwatch Band Charging cable Instruction manual ※ Measurement data is for reference only.