Our LED alarm clock for home and office has a clear focus, eye-catching font, and effective eye protection. Features: Two kinds of display, one is only time display, the other is time, date, temperature cycle display. Simply press UP/DOWN to adjust the 3 levels of brightness (Bright/ Medium /Low). Besides, the digital alarm clock will automatically be dim during 18:00-6:00 under the night mode or you can set another period of time for your need. Just press and hold the snooze button for more than 3 seconds to turn off the display to prevent the screen from lighting up at night while sleeping. (Note: If you use a cable for power supply, the clock will always be on.) When Powered by battery, you can get a extra function - voice control, which means you can activate the display by make some noise like clapping your hands, rapping on the table or touching the clock. The LED alarm clock will automatically turns off after 16 seconds of no operation and enters power saving mode, but the system still keeps normal timing and temperature and maintains the previous settings. And it comes with time memory function when you charge by AAA batteries. When powered by USB alone, there is no time for memory function after power off. Can be hung on the wall or placed on the desktop. Suitable for living room,office, warehouse, classroom and shop, etc. Specifications: Material: ABS Product Size(LxWxH) :16x6x2.5cm Power by: 3 x AAA Batteries(NOT Including) or USB Charging cable Package Contents: 1x Digital Clock 1x USB cable 1x Instruction Manual