About The Item: Hd Display Digital Color Atomic Clock Geevon Atomic Alarm Clock Color Display Is Designed With A Large 6-inch Clear Hd Display And Big Digits Providing Wide View Angles. It Has 7 Time Zones: Ast(-4)est(-5)cst(-6)mst(-7)pst(-8)akst(-9)hst(-10). By Setting The Time Zone On The Clock And Leaving It Plugged In Overnight, It Will Automatically Sync To The Correct Time During The Night With The Wwvb Function On, While Also Self-updating For Daylight Saving Time (dst). Multi-functional.