Features: High-definition Smart Watch: 1.85-inch high-definition color screen, NFC access-control system allows you to operate easily. Bluetooth-compatible Calling: BLE5.1 version, clear and smooth call function, making driving, hiking and other occasions more safer. 24 Kinds Sport Modes, Long Standby Time: as fitness tracking watch, the sportswatch supports multiple sporting modes and more comprehensive monitoring of movement data, 230mAh lithium battery, long standby time. Excellent Compatibility: compatible with iOS8.0/Android4.4 and later smartphones, convenient connection. Heart Rate Monitoring and Sleep Tracking: smart watch bracelet supports Blood glucose, ECG, temperature, blood oxygen exercises etc to better understand your healthy conditions. Waterproof: IP67 waterproo standard, effectively prevent from sweat and raining, no more worry about water in daily use(please wipe it clean after used in cold water, swimming etc). Specifications: Material: Tempered Glass/Zinc Alloy/TPU Color: Black Watch Dial: Approx. 50x36mm/1.96x1.41inch Model: KS01 Display Screen: 1.85-inch High-defination Color Screen Chip: GR5515 Battery: 230mAh Waterproof: IP67 Standby: 15days Bluetooth-compatible Version: BLE5.1 Support System: IOS8.0 or above , android4.4 or above Duration of Charging: about 2hrs Other Functions: pedometer, weather, notification, alarm, music, stopwatch, camera, etc Multi-sports Modes: built-in running, fitness, skip, hiking, stair stepper, jump rope, climbing, dance, cycling etc. more than 20 kinds of sport Message Reminder: push notifications of incoming calls, text, messages, etc Languages: 21+languages Note: Please allow 0-1cm error due to manual measurement. make sure you do not mind before you order. Please allow slight chromatic aberration due to different display resolutions. Package includes: 1x KS01 Smartwatch