T Tocas Desk / Wall Big Number LCD Screen Clock 4 Digital LED Snooze Alarm Clocks Thermometer Calendar with Power Cord Green Function:Led Clock,Thermometer( to F),Calendar,Alarm,Luminous,Snooze.Digital large big number LED clock,clear digital easy to read in day light as in the dark. Long-distance readable. it is readable easily within 25 meters, which is very different from traditional clocks Power Supply is input 100-240v,Working voltage:7.5v the LED brightness can be adjusted It can be used as a table/desk clock, but also can be hung to act as a wall clock.