KT71 1.96 inch HD Square Screen Rugged Smart Watch Supports Bluetooth CallsSleep MonitoringBlood Oxygen Monitoring 1. Material: character engraving + bottom shell environmentally friendly plastic + metal buttons + silicone 2. Waterproof level: 3ATM depth waterproof 3. Charging time: about 2.5h 4. Battery life: about 7 days of use, about 25 days of standby 5. Wristband size: total length 255mm, adjustable length 155-235mm 6. Screen type: IPS 7. Screen size: 1.96 inches 8. Pixel: RGB 240x282 9. Touch type: full screen touch 10. Bluetooth version: BT5.3 11. Gravity sensor: DA267 12. Battery capacity: 430mAh 13. Charging method: magnetic charging 14. Compatible systems: Android 6.0+ and above, iOS 10.0+ and above 15. FLASH memory: Rom64Mb 16. Support full-screen touch, heart rate, blood oxygen, blood pressure, pressure, exercise records 17. Supports sports mode, voice assistant, message push, information storage, sleep monitoring, weather push, camera remote control, music control, mobile phone search, womens health, etc. 18. APP language: English, Simplified Chinese, Japanese, Korean, German, French, Spanish, Arabic, Russian, Traditional Chinese, Ukrainian, Italian, Portuguese, Dutch, Polish, Swedish, Finnish, Danish, Norwegian, Hungarian, Czech, Bulgarian, Romanian, Slovak, Latvian, Indonesian, Thai, Turkish, Vietnamese, Indian Idiom, Pashto, Lithuanian, Estonian, Slovenian, Croatian, Greek, Filipino, Hebrew, Malay, Serbian, Persian