3 brightness adjustment levels: Dark, medium bright, super bright. adjust automatically.Temperature in Celsius, Date, Time Display, 12/24 hours system.Can put it on table by stand or wall mounted by hole.Powered by USB, battery backup for memorizing settings.Big digits for easy reading, perfect for living room, office, hotel.Display: LED DisplayTime Format: 12/24 Hour SwitchableTemperature Format :CelsiusIncluded: Button Battery (Used as memory time, can not store electricity)USB Charging Port: 5V, 1AColour:WhiteMaterial: ABSPackage Contents:1x alarm clock1x USB cableOnly the above package content, other products are not included.Note: Light 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.