Features:      Built-in touch key for easy operation.      Large LED display to clearly show time, temperature, date, week, etc.      Uses DS3231 high accuracy clock chip(with temperature compensation), it can still accurately travel time after powered by backup battery.       Special dot matrix design, reminding important festivals and alarm clock function.      The font, the time mode, the display effect and the animation effect can be switched freely.      °C/°F selectable for temperature, 12H/24H time display mode.      Can automatically adjust the brightness according to ambient light or specify it.      Includes voice control and countdown function.      With transparent case, components can be well protected.      With a power cable, it is convenient for clock power supply.            Specifications:      Material: FR4      Display Color: White / Red / Blue / Green(Optional)      Power Supply: USB Interface      Dot Matrix Size(1pc): 2.8 * 4.2cm / 1.10 * 1.65in      Acrylic Board Size(1pc): 16.6 * 4.2cm / 6.54 * 1.65in      Package Size: Approx. 17 * 11 * 3.5cm / 6.69 * 4.33 * 1.38in      Package Weight: Approx. 146g / 5.15oz            Note:      This product is easy to install, but If you do not know how to install, welcome to contact us to send user installation manual.            Package include:      1 * Digital Alarm Clock Kit      1 * USB Cable