This is the alarm clock that simulates the rising or setting sun by gradually brightening in the morning and dimming at night so you can awaken or drift to sleep naturally. It provides five different light modes and 20 color options to create custom settings and help restore one’s circadian rhythm. This gentle awakening may be accompanied with a melody sound alarm while a snooze button adds an additional 5 to 120 minutes of shuteye. When you are ready to wind down for the night, the light slowly dims over your desired period of time until it leaves your bedroom in darkness. It displays the day of week, calendar, as well as temperature and humidity readings. With a USB port for charging a smartphone or device. AC plug. 6 3/4" L x 6 3/4" W x 2 3/4" D. (1 1/2 lbs.)