Product Features: LED Dot matrix Technology, More stable and Reliable Very Soft led light, People can see very Clearly at 20meters away. Built-in Boston cell (CR2032) battery, in case of power failure to maintain clocking High brightness, large-size LED character display module. Hours, minutes and time display (12 or 24 hours format optional). Date, calendar display. Temperature display. A couple of alarm clock functions (you can set the alarm time, respectively, of a group can be individually turned off the alarm function). Equipped with infrared remote control, convenient wireless operation. High-precision clock module, precise timing, in error