X9 1.85 inch Square Screen 2 in 1 Bluetooth Earphone Smart Watch 1. Main chip: BT8959T5 2. TWS chip: 8926B2 3. Heart rate chip: Tianyi Hexin HX3605 4. Screen size: 1.85 inches 5. Screen resolution: 320x385 6. Waterproof level: IP67 7. Memory: 128MB 8. Control method: touch display 9. Touch: full screen touch 10. Shell material: glass lens + zinc aluminum alloy 11. Compatible system: Android 4.4 and above, iOS 8.0 and above 12. Bluetooth version: headphone Bluetooth 5.0, data storage Bluetooth 4.0 13. Charging case battery capacity: 240mAh 14. Headphone battery: 25mAh 15. Standby time: 8-12 days 16. Music time: 3.5h 17. Charging method: magnetic charging 18. Charging time: 1-2h 19. Supports Chinese, English, Portuguese, Spanish, German, French, Italian, Polish, Russian, Czech, Indonesian, Malaysian, Hebrew, Turkish, Arabic, Greek, Ukrainian, Swedish, Dutch, Vietnamese, Slovak 20. Supports Bluetooth calls, full touch, heart rate, shake to take pictures, call reminderrejection, information storage, multi-sports mode, weather, NFC and other functions