D07 1.7 inch Square Screen Smart Watch with Payment NFC Encoder 1. Screen size: 1.7 inch HD color screen 2. Resolution: 320x320 3. Battery capacity: 3.7V260mAh 4. Charger interface: Micro USB 5. Charging time: about 1.5h 6. Waterproof grade: IP67 7. System requirements: Android5.0 and above ios10.0 and above 8. Battery life: 3 hours of talk 7 days of normal use 15 days of standby 9. Multi-scene intelligent split-screen demonstration to meet your daily operating habits. 10. Support 21 languages around the world, and configure simultaneous notifications and push notifications for 21 countries. 11. Rich dials, you can change your wrist at will, and support third-party custom dials. 12. Support heart rate monitoring, blood pressure monitoring, blood oxygen monitoring, exercise monitoring, mileage, calorie consumption, message reminders, sleep records, message reminders, and remote control to take pictures.