Alarm Clock Nap Large Display Electronic Desktop Black Green : Dual alarm clock with battery/plug, multifunctional LED/ electronic, time/temperature/date display Brightness adjustment support: manual brightness can be adjusted on two gears Say goodbye to mechanical ticking of alarm clock, you will die down Multifunctional: voice function, snooze function, saving , adjustable snooze, alarm clock operation during the day, adjustable in night mode Memory function: Powered by three AAA alkaline batteries (included) or can be powered by an external DC 5V power supply, the external power supply will be cut off,and different settings remain unchanged and the need to repeat settings after power restoration ( do power batteries are used,The display can be turned on by voice and will turn off automatically after 16 seconds) Made of high quality plastic, and durable Best for everyone, perfect Can be used in bedroom, office, school Specification: Material: plastic; Size (LxWxH): . 16x2.5x6 cm/6.30x0.98x2.36 inch contains: 1 alarm clock 1 USB