Product: F200 Health Smartwatch Screen resolution: 360*360 Charging Method: USB Magnetic Compatible System: I0S9.0 or above/Android 4.4 or above Battery life: 7-15 days Battery capacity: 380mAh Synchronisation: Bluetooth 5.3 Waterproof grade: IP67 grade Description Automatic sleep stage monitoring: peace of mind sleep all night, using the latest GOODIX chip, combined with RESTFUL sleep technology and sleep scoring system, deep sleep analysis of 40 skin pulse detection per second, accuracy increased by 60%, and to be in the hands of the whole day oxygen saturation detection risk warning Accurate blood oxygen measurement: using the pulse wave time difference method (PWTT) accuracy far exceeds the pure optical measurement method, regular measurement of blood oxygen, especially during sleep to ensure that the blood oxygen is always maintained at a normal level table and APP on the clear display of the sleep state, and through the sleep guidance programme to guide the user to improve the quality of sleep. 1.55-inch HD large screen: high colour gamut, ultra-narrow bezel, large display. Rich and delicate colours, real and vivid picture ECG ECG monitoring on-the-go health manager: we have added ECG user calibration mode to solve the problem of measurement result discrepancy due to the difference in body conductivity, weather temperature, skin colour shades. ECG ECG monitoring on-the-go health manager: we have added ECG user calibration mode to solve the problem of measurement result discrepancy due to body lead differences in weather temperature and skin colour shades. Instructions for use 1, the product monitoring data and results are for reference only, not for diagnostic and medical purposes, please do not diagnose and yourself through the measurement results, and follow professional advice, if you feel unwell, please consult a doctor or online clinic in a timely manner. 2Please do not carry this product into the environment with magnetic field or contact with magnetic objects, entering the magnetic environment may cause product failure. 3Measuring blood pressure in the case of arrhythmia may lead to errors in blood pressure measurement. 4This product is designed for the wrist at the flexure artery blood pressure detection, blood viscosity is high, poor microcirculation, vascular sclerosis patients (such as diabetes, hyperlipidemia, hypertension, cerebral thrombosis, etc.), may cause data measurement errors. Patients with blood diseases, using this product to measure blood pressure may cause data measurement errors. 5. Patients suffering from blood diseases, using this product to measure blood pressure may cause data measurement errors. 6. When measuring, please raise your wrist with this product to a position flush with your heart. 7. Please do not exercise strenuously for 5-10 minutes before measurement, and take a sitting or lying position. Product List F200 Health Smart Watch*1 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.