Shape: Rectangle Screen material: Plastic Size: Arc: 5.12*1.97*3.15 inches Rectangular: 6.61 *1.57 *2.83 inches USB cable style: 3.5x1.35mm (18198) Voice control: Clap your hands or tap the table to wake the alarm Packing: 1 x digital alarm clock Note: Note 1: Remove the protective film on the clock screen, it will be brighter. Note 2: When only AAA battery (without battery) is used for power supply, it will be extinguished after 10 seconds Tap your hand or the table to wake the alarm If you want the screen to stay lit, plug in. Please allow manual measurement error of 1-3cm. The actual color of the item may be slightly different from the color shown on the picture due to different display and lighting effects. Thank you very much.[Dual display mode]: Long press S key, and press+/- key to switch between 12/24 hour display Under the time state, long press the - key for 3 seconds to switch the display of temperature in Fahrenheit/Fahrenheit. [Dual alarm mode]: Short press the alarm key to display the mode and status of alarm clock 1, then press the alarm key to display the mode and status of alarm clock 2, press+/- key to set the alarm clock OFF/ON, and press S key to enter the corresponding group alarm setting. When the alarm clock rings, long press the "snooze" key for 3 seconds to close the current alarm clock and enter the next alarm state. Short press any key to start taking a nap. [Adjustable brightness] Just press up/down to adjust level 3 brightness (bright/medium/low). In addition, in the night mode, the digital alarm will automatically turn dark from 18:00 to 6:00 (or you can set another time according to your needs). Just press and hold the snooze button for more than 3 seconds to turn off the display screen to prevent it from lighting up at night. (Note: If you use a cable for power, the clock will always be on.). [Voice control and Do Not Disturb Mode] - Voice control, which means that you can activate the display screen by making some noises, such as clapping your hands, tapping the table or touching the clock. Under the time state, long press the 3 second snooze key to enter the No Disturb Mode, close the display screen, turn off voice wake-up, and just press the key manually to wake up the screen. [Large display and multi-function] The digital alarm clock has a large LED display, so you can see the time clearly even if it is far away from you. Our desktop clock has many modes: clock mode, date mode, temperature mode, night mode (on/off), alarm mode. The buttons on the back are very simple instructions, so installation is very simple!.