Specifications: Dimension1：150x45x65mmDimension2：220x45x65mmShell type: AcrylicUSB Power: 5 V 2A micro USB1.1.Time backup battery type: CR1220(Not included) Features: -Time display -Automatic rainbow color change, Can set the rainbow change speed, Can set ON or OFF -Set the color manually, Automatically switch colors,(When the rainbow is off) -12/24 hour module -Sleep module(22:00~07:59 no display. 08:00~22:00 display) .Can set ON or OFF -Refresh time effect setting(0~9 minutes). Set automatic save -Day and night brightness settings. Automatic save -Second display, can be set to be fixed or flashing Button layout: left, middle, right (Numbers are displayed on the front)-  Product Includes: