Important Tips 1.Charge it first to activate the device the first time you receive it. 2.Search and download the " Keep Health "APP on the APP store or Google Store to your phone .( You can also Scan the User Manual QR code and download "Keep Health" app.) 3.Turn on your phone's Bluetooth 4. Go to the APP create account and logs in and then click the Add a Device to find the C60, click it to connect. 24/7 Health Fitness Tracker The fitness watch can measure your heart rate, blood oxygen in real time for 24 hours . Accurately track sleep status including: deep sleep/light sleep/awake and generate targeted reports for your review. The smart watch adds a function for women to record their menstrual cycle to help them pay more attention to their health.