The LED clock is suitable for use in your living room, bedroom, office, gym, business, basement, and other areas. 12/24 hour multifunction display, time, temperature, alarm, and night light Built-in battery for recording time when the power goes out. Only the USB wire powers the clock; remote control ranges from 8 to 10 meters; 4-level brightness adjustment Please find your most comfortable setting. The USB cord powers the LED clock. Behind the clock, the wire can be hidden. It appears to be a very cool way to adorn your home or office.