Product Description How to monitor your blood pressure and blood oxygen? 1. Set personal information correctly in the App. 2. Wear the watch 1.5-2.5 cm below the wrist bone, and adjust the strap not too tightly or too loosely. 3. Enter the blood pressure and blood oxygen monitoring mode, and keep your arm stable. 4. When you wear the watch on the wrist and need to wait 10 ~15 seconds to show the monitoring data. How to track your sleep? 1. Set personal information correctly in the app. 2. Wear the watch 1.5-2.5 cm below the wrist bone and adjust the strap not too tightly or too loosely when you sleep. 3. It will automatically monitor your sleep state from 8 pm to 10 am. You can check your sleep trends in the app. Note: the data cannot be used as a medical-grade test. Special Features: 1. IP67 Water-resistance: With IP67 waterproof design, you can wear it while washing hands or running in the rain. It can't be in saltwater. 2. Main Features: Sleep Tracking, Heart Rate Monitor, Blood Pressure Monitor, Blood Oxygen Monitor, 7 Sports Modes ((Walking, Running, Cycling, Skipping, Badminton, Basketball, Football). 3. Get More Features (required connected with app): Raise to Light Screen, Find Phone, Sedentary Reminder, Music Control, Remote Camera, Don’t Disturb Mode and Weather Display How to get message notifications on the watch? Connect the watch with HeroBandIII App and turn to 'Watch'?'Notification' Choose the App you want to receive messages. For example, if you want to receive Facebook notification, turn on 'Facebook' option and allow notification. Then go to 'Homepage' and pull down screen to sync. Please confirm whether the message can be displayed in the notification bar of the phone. The watch receives messages by reading the notification bar of the phone. If the message notification on the phone is not working, the watch cannot receive the message. Note: If you do not allow the App to receive mobile notifications when installing HeroBand?, you can set it in the following ways. For iPhone: Open 'Phone Settings'?Click '8luetooth'?Select 'P22'?Turn on 'Share Systems Notification' For Android: Open HeroBandIII App?Click 'Notifications'?Click 'Notification access'?Turn on 'HeroBandIII' For iPhone Android: Open 'Phone Settings'?Click 'Notification'?Select 'HeroBand?'?Turn on 'Allow Notification'. The watch doesn't support answer call and text back. Heart Rate Monitor ? ? Step Counter ? ? Message Notifications ? ? Blood Pressure Monitor ? Blood Oxygen Monitor ? Sleep Monitor ? ? Waterproof IP67 5ATM App HeroBandIII Zeroner Health Pro Size 1.4 inch Touch Screen 1.3 inch Touch Screen 60 cm/23.62 inch 5.85 - 8.78 inch