About This Product Large Display, Versatile: This digital alarm clock features a large LED display (6.3' x 0.7' to 1' x 2.36'), allowing you to easily check the time even from a distance. Our desk clock features five modes: clock, date, temperature, night mode (on/off), and alarm. The buttons on the back are easily located, making setup simple Weekday Mode & Snooze: Choose from three alarm modes to wake you up at a fixed time: Monday to Friday, Monday to Saturday, or Monday to Sunday. Press and hold the "Alarm" button, then use the "Up" and "Down" buttons to adjust the hours, minutes, snooze time, and weekday mode. Two Power Options: This bedroom alarm clock comes with a 1.5-meter/59-inch power cord (AC adapter not included), which is very energy-efficient. It also has a time memory function when charged with AAA batteries. (When powered by a USB-C cable alone, the time memory function is disabled after the device is turned off.) We recommend installing batteries and using the USB-C port for continuous power. The alarm will continue to operate even when the screen is on and retain the time memory even after it's turned off. This allows you to check the time at any time and saves battery life Tips: If the LED clock isn't working or displaying, first check the alarm to see if the LED screen is off or if the alarm isn't working. a) When using USB power, check the cable for loose connections or improper insertion, or check the charging port for issues. b) When using battery power, if the alarm doesn't light up, check the batteries are correctly installed, ensuring the correct polarity. Note: 1. When using battery power alone, pressing any button will wake the screen. 2. When using USB power, the screen remains on. 3. In Night Mode, the screen brightness automatically adjusts to 3%.