D9 1.46 inch 2 in 1 Bluetooth Earphone Smart Watch, Support Bluetooth Call NFC Heart Rate Hardware parameters: 1. Chip: Main chip JL7012+TWS AD6973D4 2. Memory: 128M 3. Heart rate: HX3602 4. Screen type: TFT 5. Screen size: 1.46 inches 6. Resolution: 360 x 360 7. Health monitoring: heart rate, blood oxygen, blood pressure, sleep 8. Touch: screen touch 9. NFC: Supported 10. Charging: Magnetic charging 11. Watch Bluetooth: Bluetooth 5.3 12. Battery: Charging compartment battery capacity: 240mAh polymer lithium battery Headphone battery capacity: 28mAh polymer lithium battery 13. Headphone buttons: Support touch buttons, previous song, next song, answerhang up 14. Standby time: more than 15 days 15. Music time: 4-5H 16. Charging time: 1-2H System parameters: 1. System: iOS12 or above, Android 7.0 or above, Hongmeng 3.0 or above 2. Sports data: step counting, distance, calories, push-ups, indoor running, plank, indoor cycling, skipping, yoga, battle rope, sit-ups, elliptical machine, outdoor walking, outdoor running, outdoor cycling, mountaineering, badminton, basketball, football 3. Sedentary reminder, water drinking reminder, alarm clock, weather, breathing training, shake to take pictures, stopwatch, find mobile phone, raise wrist to light up the screen, frequently used contacts, bedside lamp, calendar, calculator, timer, music control 4. Information reminder: SMS, incoming call, WeChat, Alipay, QQ, Facebook, Twitter, Line, Whatsapp, Instagram, etc. 5. APP supports languages: Russian, Hungarian, Hindi, Indonesian, Turkish, Hebrew, Greek, German, Italian, Czech, Japanese, French, Polish, Persian, Thai, Tamil, Simplified Chinese, Traditional Chinese, English, Dutch, Filipino, Portuguese, Spanish, Vietnamese, Arabic, Korean 6. Watch language: Chinese, English, Russian, Japanese, Persian, Spanish, Portuguese, Arabic, Indonesian, Thai, Vietnamese, Filipino, Turkish, French, Korean, Traditional Chinese, German, Italian 7. APP: FaceLink