TIME PROJECTION: The 180 adjustable projector projects the time onto your wall or ceiling. Option to rotate projection orientation. Projects the time in a soft blue and is clear to read and easy on the eyes at night. WAKE MODE: Two volume levels to choose from L01 and L02; WEEKEND MODE: The alarm will not sound on Saturday or Sunday; REPEAT FUNCTION: Temporarily stop the alarm and will sound again after 9 minutes. BACKLIGHT / PROJECTION BRIGHTNESS: Adjust the backlight brightness when powering from the USB power cable, choose between high (bright), low (dim) or off. When powering from batteries, turn on the backlight and it will automatically turn off the backlight after 5 seconds, turn on the time projection and it will automatically turn off the backlight after 10 seconds. DATE AND TEMPERATURE: Displays month, day, day of the week and indoor temperature. Switch temperature units between Fahrenheit () or Celsius (). AC POWER or BATTERY POWER: 3 AAA batteries (batteries included) Large backlit display: Displays month, day, day of the week and indoor temperature. Switch temperature units between Fahrenheit () or Celsius (). You can adjust the brightness of the backlight while powering the device with a USB power cable, choose between high (bright), low (dim) or off. When using the battery, turn on the backlight and it will automatically turn off after 5 seconds. Bright wall projection: The 180 adjustable projector projects the time onto your wall or ceiling. Option to rotate projection orientation. Projects the time in a soft blue and is clear to read and easy on the eyes at night. Adjust the brightness when powering from the USB power cable, choose between high (bright), low (dim) or off. When powering it from batteries, activate the time projection and the backlight will automatically turn off after 10 seconds