HW28 1.39-inch IP67 Waterproof Health Monitoring Bluetooth Call Smart Watch with NFC Payment 1. Main control chip: Hs6621PG 2. System requirements: android5.0+ ios10.0+ 3. Call Bluetooth: AB5376A2 4. Heart rate chip: HRS3300 5. Bracelet memory: 128M 6. Screen display: 1.39-inch-round screen-TFT, resolution 360X360 7. Bluetooth version: 5.2 8. Battery capacity: 300mAh 9. Standby time: 60 days 10. Usage time: about 7 days 11. Button mode: full-screen touch 12. Charging port: wireless charger 13. Waterproof level: IP67 14. Sensor: G-sensor 3-axis 15. Local dial: 5 16. Dial market: 50+ 17. Menu style: 5 18. APP: WearFit pro 19. UI language: Simplified Chinese, Traditional Chinese, English, French, German, Japanese, Spanish, Italian, Russian, Portuguese, Turkish, Vietnamese, Thai, Arabic, Polish, Dutch, Hebrew, Persian 20. Message push: Simplified Chinese, Traditional Chinese, English, French, German, Japanese, Spanish, Italian, Russian, Portuguese, Turkish, Vietnamese, Thai, Arabic, Polish, Dutch, Hebrew, Persian 21. APP supported languages: Simplified Chinese, Traditional Chinese, English, French, German, Japanese, Spanish, Italian, Korean, Russian, Thai, Czech, Portuguese, Indonesian, Arabic, Turkish, Greek, Estonian, Bulgarian, Latvian, Lithuanian, Romanian, Serbian, Slovak 22. Product net weight: 62g Packing list: -Watch x 1 -Instruction manual x 1 -Charging cable x 1