Settings > Battery; Settings > Display; Settings > Scheduled Power On/Off; Settings > Audio Profiles - Zte Optus P500 User Manual

Settings > Battery
Open Settings and touch Battery to view the battery level and
enable Power-saver mode. Touch App Power-saver manager
to configure power management for apps, check the battery
usage and the apps that consume battery power improperly, and
cool down the battery by disabling running apps.
Settings > Display
Open Settings and touch Display to configure the display
options, including font size, screen sleep time, brightness level,
auto-rotate screen and more.
Settings > Scheduled Power On/Off
Open Setting > Features and touch Scheduled power on/off
to set the day and time when the phone automatically powers on
or off. You can also touch the switches on the right to turn the
features on or off.
Settings > Audio Profiles
Open Settings and touch Audio profiles. You can adjust
different types of volume, set sound mode options, set up
ringtone and notification sound and select system sounds.
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