WS520 1.28 inch IP67 Sport Smart Watch, Support Bluetooth Call Sleep Blood Oxygen Heart Rate Blood Pressure Health Monitor 1. Bracelet size: 4.96 x 4.16 x 0.985cm 2. Weight: 38.5g 3. Chipset: 7012-A6 4. APP: FereFit 5. FLASH memory: 128MB 6. Compatible with smartphone systems: Android 5.0 or IOS 9.0 or above systems. 7. Screen size: 1.28 inch, Full touch screen. 8. Resolution: 416 x 416 9. Bluetooth: 3.05.0 10. Waterproof Level: IP67 11. G-Sensor: MSA311 12. Battery: 230mAh lithium polymer battery. 13. Charging Method: Wireless charging. 14. APPWatch language: English (default), Chinese (simplified), Turkish, Russian, Spanish, Italian, Portuguese, German, French, Dutch, Czech, Hungarian, Thai, Hindi, Greek, Vietnamese, Arabic, Indonesian, Ukrainian, Hebrew, Persian, Malaysian. 15. Major function: Calculator, business card, payment code, calendar; Drainage, women's health, breathing training, messaging, flashlights; Voice assistant, blood oxygen, phone (contacts, dials, call records, SOS), step counting, alarm clock (add alarm clock, snooze settings), location; Games (bird, ground mouse, airplane battle), blood pressure, exercise records, heart rate, music, settings (dial settings, theme switching, menu background, display settings, raise hand to light up, do not disturb mode, rest screen dial, vibration settings, sound settings, language, time settings, date settings, phone connection, password, system menu, gesture control, about); Vibration settings, timer, sleep, stress, weather, exercise 17 (running, treadmill, cycling, brisk walking, mountaineering, yoga, basketball, football, badminton, baseball, table tennis, volleyball, tennis, cricket, golf, hockey, tai chi); Breath screen dial, stopwatch, search for phone, camera, UI switch; Do not disturb mode, raise your hand to light up the screen, display, menu background. 16. Charging time: 2-3H 17. Lifetime: 7-15 Days 18. Wristband size: Total length 250mm, width 18mm.