D13 2 in 1 Bluetooth Earphone Smart Call Watch, Support Bluetooth Call NFC Health Monitoring 1. Bluetooth version: 5.3 2. Battery capacity of charging bin: 240mAh polymer battery 3. Headphone battery capacity: 28mAh polymer battery 4. Charging box function: The main body can charge the earphone for 2-3 cycles time 5. Life time: 15days and above 6. Music time: 4-5H 7. Charging method: Magnetic charge 8. Charging time: 1-2H 9. Main chip: JL7012 10. TWS chip: AD6973D4 11. Heart rate chip: HX3602 12. Screen: 1.46TFT 360x360 Full touch 13. Memory: 128Mb 14. Compatible systems: IOS12and above Android7.0 and above Hamony3 and above 15. APP: FaceLink 16. Net weight of the bracelet: 68.20g (body+silicone strap) 95.6g（Main body+steel watch straps） Function 1. NFC, APP personalized dial, watch 6 UI interface switching, address book, Bluetooth dial-up call 2. Health monitoring (heart rate, blood oxygen, blood pressure, sleep) 3. Exercise data (step count, distance, calories), indoor exercise (push ups, indoor running, plank, indoor cycling, jump rope, yoga, battle rope, sit ups, elliptical machines), outdoor exercise (outdoor walking, outdoor running, outdoor cycling, mountaineering, badminton, basketball, football) 4. Reminder (information, sedentary, drinking water, alarm clock), weather, breathing training, shake photo, stopwatch, search for phone, raise wrist to light up screen, frequently used contacts, bedside light, calendar, calculator, timer, music control 5. SMS, incoming call, WeChat, Alipay, QQ, Facebook, Twitter, Line, Whatsapp, Instagram, etc 6. Earphone touch button function: Wear on both ears, Music status: Click the left or right ear to play or pausetriple-click the voice assistant; double-click the previous song on the left earlong press to decrease the volume, double-click the next song on the right earlong press to increase the volume. One ear wear, Music status: Double-click the next song, long-press to increase the volume, and the other settings are the same as for b