About this item Bluetooth Calling Smartwatch: With the Ultra Smartwatch, enjoy a smooth connection with Bluetooth calling. Good Display: The Ultra Smartwatch has a crystal-clear resolution of 520*580 pixels, allowing you to see everything on the screen. Sleep Monitor: Use the watch's sleep monitoring feature to keep an eye on your sleep health by tracking all the stages of your sleep each night. Call & MSG Alert: The integrated smart optical heart rate sensor allows for round-the-clock heart rate tracking. The app can be used to enable smart app notifications and SMS alerts.