YK15 1.46 inch Round Screen Bluetooth Call GPS Sports Smart Watch 1. Basic Functions: Time and date display, step count, calories, distance, stopwatch, countdown timer, heart rate monitoring, blood pressure monitoring, blood oxygen monitoring, sleep monitoring (sleep time, sleep quality), data, exercise, exercise records, weather, messages, womens status, music, sidebar, stopwatch, timer, alarm clock, payment QR code, business card, calendar, calculator, find my phone, camera, 100+ sports modes on the watch, 100+ sports modes on the app, customizable watch face, watch brightness adjustment, watch MAC address view. 2. Reminder Functions: Call reminder, sedentary reminder, alarm clock reminder, SMS, QQ, WeChat, Facebook, Twitter, LinkedIn, WhatsApp, LINE, Instagram, Snapchat, Skype, Gmail, and other apps. 3. Special Features: WeChat Sports integration, exercise goal setting, fitness information sharing, smart alarm clock, raise to wake, screen-on time, find my phone, call rejection, Bluetooth calling. 4. Watch Supported Languages: English, Simplified Chinese, Traditional Chinese, Arabic, Russian, Spanish, Greek, Hebrew, Vietnamese, Czech, Turkish, Italian, German, French, Portuguese, Romanian, Polish, Thai, Hungarian, Persian, Indonesian, Ukrainian, Bulgarian, Slovak, Slovenian 5. App Supported Languages: English, Simplified Chinese, Traditional Chinese, Arabic, Russian, Spanish, Greek, Hebrew, Vietnamese, Czech, Turkish, Italian, German, French, Portuguese, Romanian, Polish, Thai, Hungarian, Persian, Indonesian, Ukrainian, Bulgarian, Slovak, Slovenian Parameters: 1. Bluetooth Version: BLE 5.3 (Low Power) 2. CPU: RTL8773EWE 3. Heart Rate Chip: VC30F-SG 4. Band Memory: RAM 578KB + ROM 640KB 5. External Flash: 128MB 6. Screen Display: 1.46-inch IPS, 360 x 360 resolution 7. Battery Capacity: 580mAh 8. Standby Time: Approximately 40 days 9. Working Time: Approximately 7 days 10. Physical Buttons: Full touchscreen + 3 physical buttons 11. Motor: Built-in vibration alert 12. Charging