Features: Led time display (time display 0:00) There are 3 brightness levels (the default brightness is medium) Night mode with automatic dimming Three function buttons in total: mode, up and down Time display of 4 positions in total (12 / 24-hour mode) The alarm Al is displayed at 6:00 Alarm with sleep function Sleep function, 5-60 minutes (default interval is 5 minutes) Power supply: 5V (excluding AC adapter), CR2032 button battery (excluding) for setting backup, USB cable (including) Time setting: Press the mode for 3 seconds to enter the time setting. The setting sequence is hour minute. Alarm settings: In the alarm mode, press the mode key for 3 seconds to enter the time setting. The setting sequence is: when the hour minute is set, Al " will light up. When the alarm buzzes: Press mode to activate the sleep function. The Al will flash. Or press to turn off the alarm. The Al will close. Night mode: In the night mode, the clock will automatically reduce the LED brightness, and press mode twice to enter the night mode. Press mode to turn the night mode on / off. When the night mode is on, press mode to end the night mode setting. The setting sequence is: start hour start minute end hour end minute. Brightness level setting: 3 brightness levels: bright, medium and dark The default brightness level is medium. Press up to switch the brightness level. color: White Material: ABS Package Contents: 1 x led clock 1 x usb cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.