[WWVB Auto Time Synchronization] Equipped with an internal receiver, this clock automatically syncs with the WWVB signal from 1:00-5:00 am daily to ensure accurate time and date. It supports four time zones: EST, PST, MST, CST. If your location falls outside these zones, manual adjustments are necessary. [Automatic Daylight Saving Adjustment] This clock simplifies time management with its automatic DST feature, advancing the time by one hour at the start of daylight saving. Verify that your region observes DST to utilize this function effectively. [Indoor Temperature & Humidity Tracking] Stay informed about your indoor climate with this clock's precise temperature range of 14°F to 140°F (-10°C to 60°C) and humidity range of 20% to 95% RH. It features an Air Comfort Indicator with three levels: COMFORT, DRY, and WET, for optimal environmental awareness. [Customizable Alarm with Convenient Snooze] Set up the programmable alarm to suit your schedule, complemented by a 5-minute snooze function for those extra minutes of rest. Exiting snooze is quick and easy-simply press any button except the Snooze/Light. [Flexible and User-Friendly Design] Featuring a 4.9 inch HD display with a 5-second backlight, this versatile clock offers both 12H/24H formats and temperature units in °F or °C. It can be placed on a desktop or mounted on a wall and is battery-operated for easy placement anywhere (not includes 3 x AAA batteries). Color:White Material:ABS Package Contents: 1 * Alarm clock