K9 Ultra Pro 1.39 inch Silicone Band IP67 Waterproof Smart Watch Support Bluetooth Call NFC 1. Functions: Alipay, NFC, custom dial switching (support APP push), 4 UI interface switching, phone book, Bluetooth dial-up calls, health monitoring (heart rate, blood oxygen, blood pressure, sleep), data (step counting, distance , calories), multiple sports modes (walking, cycling, running, football, volleyball, tennis, breathing training, basketball, etc.; APP supports 100+ switches), reminders (information, sedentary, drinking water, alarm clock), weather , WeChat sports, music control, women's health, breathing training, remote photo taking, stopwatch, find mobile phone bracelet, intelligent language assistant Siri, raise the wrist to brighten the screen, frequently used contacts, split screen (sidebar), flashlight, calendar, shortcut bar (control center), business card (friends), calculator, button with encoder; application notification reminder: SMS, incoming call, WeChat, QQ, Facebook, Twitter, Line, Whatsapp, Instagram 2. Language system: Simplified Chinese, English, Russian, Spanish, German, Italian, French, Portuguese, Turkish, Hebrew, Arabic, Vietnamese, Traditional Chinese, Thai 3. Product screen: 1.39TFT 4. Resolution: 360x360 5. Working hours: 5-7 days 6. Standby time: more than 15 days 7. Storage: 128Mb 8. Bluetooth versionchip: Bluetooth 5.2RTL8763WEW 9. Material: zinc alloy + IML + silicone strap 10. Touch mode: full screen touch 11. Call duration: 6H 12. Charging time: 2H 13. Battery: 250Amh 14. System: iOS10.0&Android 5.0 15. Interface: wireless charging