[Modern Cube Design] - USB output power supply recommended: The design and color of this wooden alarm clock complement the surrounding environment. Not only is it a clock with a large LED display, but it's also a great decoration for your room. [MINI COMPACT SIZE 2.5"]: This is a small desk clock, great for bedside tables, desks, or a portable battery-operated clock NOTE: To keep the clock displaying the time, double-click the “DOWN” button to set it to standard mode. "--:sd" to turn off sound control mode. It is recommended to use a USB socket for daily power supply. Batteries for backup or travel use. With LED bulbs, the digital clock consumes more power and may drain the battery quickly. [ADJUSTABLE BRIGHTNESS LEVELS]: L1~L3, 3 brightness levels can meet your different needs, so it's not too bright at night and bright enough during the day. Easily choose a comfortable brightness for your eyes. [3 CONVENIENT ALARM SETTINGS]: This LED alarm clock allows you to set 3 sets of alarm times to wake you up in the morning or remind you of important dates or appointments; you can also use it These 3 alarm settings are for the snooze function. For example, if alarm 1 is set for 7:00 a.m., alarm 2 can be set for 7:10 a.m. after 10 minutes for a 10-minute snooze.