SelfSetting Alarm Clocks with Auto DST plug in the clock and it sets itself no need to set time manually Time automatically changes for Daylight Saving Time no reset hassle Eight time zones optional EST CST MST PSTASTHATAKT Large Clear Display with Temperature Humidity the 5 inches large screen displays the clock time day of the week date time zone moon phases which is easy to read at any angle The Swiss high precision SHTC3 humidity gauge and temperature sensor assist you to maintain an accurate indoor air quality for your family 6 Level Brightness Plus Auto Dim Mode 6 level adjustable brightness plus auto dimmer allow you to dim the clock display to a comfortable level on your preference No glaring light at night but bright enough to read time Bedside digital Alarm Clock with USB Charging Port alarm goes off with ascending beeping frequency which lasts for 2 minutes No jarred awake nor blaring sounds The snooze feature allows you to catch more sleep An extra USB port serves as a charging station for your cellphone etc Outlet powered desk clocks with Battery Backup clock is adapter powered and 3 x AAA backup batteries not included will keep the clock running and trigger the alarm in the case of power cut No need to worry about oversleep