The sleep time function on the Xiaomi 14T determines how long the screen remains on when inactive before it automatically turns off to save battery. To set the sleep time on the phone, please refer to the following steps: 1. Open the[Settings]APP on your phone; 2. Scroll down and select [Lock screen]; 3. Tap [Sleep]; 4. Choose the desired time for your phone to enter sleep mode when inactive. Note: 1. When reading or watching videos, prolonged screen illumination is more convenient and suitable for extending sleep time; 2. Shorter sleep time helps save power and is suitable for use when the battery is low or not in use for a long time; 3. Displaying static content for extended periods can make colors uneven.