【All Day Sleep Tracker】The newly upgraded fitness band tracker can not only track your sleep at night, but also track your nap sleep during the day to meet your different needs. Professionally interpret the sleep characteristics of each stage, analyze sleep quality, including sleep duration, deep sleep, light sleep and wake-up time. Help you understand your sleep patterns so you can make smart adjustments for better rest and recovery.How to measure HR/ BP more accurately? 1. Please make sureyour personal info (age, heightweight) in "QWatch Pro" are filledin correctly. 2. Swing of the arm, wearing too tight or toolooseraising the arm and making a fist affect your bloodcirculation and thus affect the measure signal. You can turn on theelevatedheart rate measurement function in "QWatch Pro". (Note:This product is not a medical device, allhealth data are forreference only, not as an absolute standard for iudging health.What should l do if my watch isn't working properly? 1. Charge thewatch with a high current for at least two hours to activate it. 2.Reset the watch and reconnect it to the mobile app. 3. Update thewatch and mobile app to the latest versions.【Free APP & Warranty Service】 EGQlNR fitness tracker do nothave any membership services, our APP is completely FREE to use.Our activity & hitness trackers promise 30-day free return policy,1-Year wa-rranty and 24/7 lifetime tech support for your hassle.free purchase. lf you have any questions or more suggestions,please reach us without any hesitation.(Path: Find order--.Contact seller)【Warm Tips】 This product is not a medical device and cannot be used for medical purposes.