[Atomic Wall Clock]: Receiving WWVB(RCC) radio wave signal to adjust time according to the time zone. Updating daylight saving time automatically.[Atomic Clocks with Indoor Outdoor Temperature]: The Wireless outdoor sensor (included) transmits the outdoor temperature to the atomic wall clock.The effective distance up to 300 ft / 100 m.[Atomic Alarm Clock Large Display]: Equipped with 7.5 inch screen,Easy to Read, Easy to Use, Easy to Set up. Displays the Time, Day, Date, Weekday and Temperature . 12/24 Hour clock modes.[Wall Clock or Desk Clock]: It can be hanging on the wall or standing on a table to use alarm feature.NO BACKLIGHT DISPLAY. The display couldn't be seen at night Multiple Languages: 7 languages (English, Dutch, French, German, Italian, Portuguese& Spanish)[Wall Clocks Battery operated]: The clock and the wireless sensor work with 2 x AA Cell batteries (NOT Included).Time alarm with 5 minutes snooze.Clock Dimension: 235x165x25mmTransmitter Dimension: 57x133.7x80mmEasy to installThis digital clock comes with 2options for wall mount and table stand.The product has a small hole design at the back,you can hang it on the wall; With Stable vertical support,you can put it on the deskSuitable for different place: it can be used in the Bedroom, the Study, the Living room ,the Dinner room, the Office and etc.How to Replace the Battery?1:Position the Atomic Clock and the Outdoor Sensor five to six feet apart with nothing between them.2:Insert the batteries into the Atomic Digital Clock first, observing the correct polarity(see markings inside battery compartment).3:Immediately after and within 3 minutes, insert the batteries into the Outdoor Sensor,observing the correct polarity (see markings inside battery compartment). Replace the battery cover.Radio reception is weaker in rooms with concrete walls and in offices In such environments, place the system close to the window. We recommend a minimum distance of 8 feet(2.5 meters) to all sources of interference,such as televisions or computer monitorscolour: silver + blackMaterial: ABSPackage Contents:1 x Wall Clock1 x Outdoor TransmitterOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.