Features: Large 8-shape LED display provides clear reading even from a distance. Indoor Thermometer Function: 0~99C temperature display range. It displays time(12H / 24H) and temperature(C) by turns. 3 Display Colors Switchable: white / blue / red, it supports automatic or manual switching. 3 Levels of Luminance Adjustable: bright / medium / dark. Manual / Automatic Luminance Adjustment: in the automatic mode, the light automatically adjusts to the appropriate brightness according to the degree of brightness near the light window. With alarm and snooze function. Powered by USB power, USB cable is included. Comes with a bracket, can be placed on the table-top or hung on wall (screw is not included). Note: The button cell (not included) is only for recording the setting time; the buttons would not react under this condition.