Adjustable brightness The digital clock has 4 brightness levels with high-quality LED lighting. You can choose the most comfortable brightness for your eyes. Multifunctional alarm clock: 2 display modes of the digital alarm clock show the time (12/25 hours) (C / F) or the date month year. Perfect decoration for offices, living rooms and bedrooms. Convenient 3 alarm settings: 4 groups of alarm clocks can be set. You could use it to snooze. Best alarm clock for bedrooms and heavy sleep. DualPower Supply: This wooden alarm clock comes with a USB power cable or can run on 5 * AAA batteries (not included) Note: Since the LED alarm clock consumes a lot of electricity, it may run out of power within three days if battery power is used. We recommend customers use power lines. PowerSaving Voice Control: In energy-saving mode, the display switches off after 10 seconds, so you can sleep wonderfully. If you tap on a value above 61 dB or hear a noise up close, the wooden alarm clock will be activated. It wont bother you.