Dear customers. Thank you for your support and choice. If there is any problem with our products, no need to complain, please contact us through the order information. Due to the time difference, we may not be able to respond immediately, but we will definitely provide a satisfactory solution within 24 hours to solve any problem for you! ! ! E400 Your Health Butler Smartwatch E400 specializes in the research and development of health smart wearable products, with a core team mainly composed of senior experts from the medical industry, focusing on building to become your health assistant and accompanying your health. The watch can be linked to the mobile application, application name: H Band, the product contains all the instructions in English, buy it with confidence. -Health management -Heart rate monitoring. One touch wrist measurement control, in ECG test mode, ECG button on Changan watch (or click Start test on APP). -Blood glucose monitoring (The unit of blood glucose test value is international version: mmol/L; 1 mmol/L = 18 mg/dL). >>>> >>4 detection modes >>01 Wrist measurement Single-key monitoring In ECG measurement mode, press and hold the ECG button on the watch (or click Start Test in the app) to start the ECG measurement. >>02 Wearable mode: you can measure the ECG by hand Remove the strap from the watch and fasten it to the ECG holder. In PTT mode, heart rate and ECG waveform can be detected. >>03 Heart rate belt mode: use the heart rate belt monitoring. Wear the ECG holder on the chest through the heart rate belt, and the heart rate and ECG waveform waveform can be detected in PTT mode. >>04 Chest sticker mode: use heart rate tag monitoring. Stick the ECG holder on the chest through the chest sticker, and the heart rate and ECG waveform can be detected in PTT mode. Portable, real-time, safe and accurate, the school data are stored in the cell phone, and the blood glucose interval value is pushed out for accurate calculation and comprehensive evaluation, and the user is informed of the trend of blood glucose fluctuation in a timely manner. - Temperature monitoring The built-in thermometer function of the smart watch automatically monitors body temperature continuously for 24 hours, making a report on body temperature changes and issuing an early alert when body temperature is abnormal, so that you can be safe and secure every day you are away from home. -Blood pressure monitoring Automatic real-time blood pressure monitoring Intelligent pulse wave technology 30S pulse wave watch blood pressure data 24 hours blood pressure health monitoring, recorder the process of blood pressure changes, understand the state of blood pressure, and synchronize APP, more detailed data feedback, always pay attention to the health