D8 2.01 inch 2 in 1 Bluetooth Earphone Silicone Band Smart Watch, Support Health Monitoring NFC Watch features: 1. Supports one-click connection by scanning QR code, Alipay, NFC, custom dial switching (supports APP push), 5 UI interface switching, address book, Bluetooth dial-up call, weather, breathing training, remote photography, stopwatch, search for mobile phone, lift Wrist screen, frequently used contacts, split screen (sidebar), flashlight, bedside lamp, calendar, shortcut bar (control center), calculator, mini-games, map 2. Health monitoring: heart rate, blood oxygen, blood pressure, sleep 3. Fitness records: steps, distance, calories 4. Multiple sports modes: outdoor walking, outdoor running, indoor walking, badminton, indoor running, outdoor cycling, indoor cycling, triathlon, hiking, elliptical machine, stepper, rowing machine, etc. 5. Reminder: information, prolonged sitting, drinking water, alarm clock 6. Information reminder: SMS, incoming call, WeChat, QQ, Facebook, Twitter, Line, Whatsapp, Instagram Headphone button functions: 1. Wear it with both ears, music status: single click on the left or right ear to play or pausetriple click on the voice assistant; double click on the left ear to play or hold the previous songlong press to decrease the volume, double click on the right ear to play the next songlong press to increase the volume. 2. Wear it on one ear, music status: double-click the next song, press and hold to increase the volume, otherwise the same as for both ears. 3. Call: Click to answerhang up, long press to reject. Press and hold to increase the volume during a call. 4. Press and hold for 5 seconds to turn on the phone, and it will automatically pair when it comes out of the warehouse. After connecting once, it will automatically connect to the phone's sound and convert it to the headset. It will automatically shut down if Bluetooth is not connected for a certain period of time after leaving the warehouse. parameter: 1. Bluetooth version: Bluetooth 5.3 2. Charging compartment ba