Haylou Watch 4S Smartwatch

* This product is not designed as a medical device and is not intended to diagnose, treat, cure, or prevent any disease. All data and measurements are for personal reference only and are not to be used as a basis for diagnosis. * The content and functions shown on this page cannot be guaranteed to provide permanent service and may be adjusted due to changes in copyright, business, or technical conditions. If changes are not separately notified, please refer to the actual content and functions of the product. * Some device functions (including, but not limited to, incoming call alert, notification alert, etc.) require the app to keep running in the background to take effect. Please refer to the tips and guidance on the watch or in the app for details. * Battery life test data comes from Liesheng Lab. In actual use, battery life may vary depending on use, settings, signal strength, and many other factors. The actual use time may be slightly different from the nominal value. In a low-temperature environment, battery performance will be reduced, and battery life will be shortened. * Please use the official charging cable. Can not use a third-party charging cable, so as not to affect the normal use of the product. * All-day monitoring needs to be manually turned on in the app. The app supports heart rate, blood oxygen, sleep, and pressure monitoring under the conditions of the measuring device