USB and Battery Powered: There are 2 power supply modes of clock. It can be powered by USB cable. When powered by battery (not included), clock has a time memory function, no need to reset after power failure. The large digital clock is simple and easy to set up.
Large Display and Multi Function: Digital alarm clock with large LED display, which lets you check the time clearly at a glance even it is far from you. Display time, temperature, date, and day of the week on the same screen. Can be wall mounted or placed on a tabletop.
Adjustable Brightness: LED alarm clock is equipped with a light sensor and 4 level brightness display, L1 brightest, L2 second brightest, L3 slightly bright, L4 dimmest. Suitable for bedrooms, offices and other indoor venues.