Adjustable BrightnessThe digital clock has 6 levels of brightness 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 (12/27 hours) (C / F) or the date month year. Perfect decoration for offices, living rooms and bedrooms. Convenient 3 alarm settings: 6 groups of alarm clocks can be set. You could use it to achieve a snooze function. Best alarm clock for bedrooms and heavy sleepers. DualPower Supply: This wooden alarm clock comes with a USB power cable, or you can use 7*AAA - Batteries (not included) Note: Because the LED alarm clock consumes a lot of power, it can run on battery power within have no electricity for three days. We recommend customers to use power lines PowerSaving & Voice Control: In power saving mode, the display will turn off after 10 seconds, giving you a great night's sleep. If you tap above 63dB or hear a sound up close, the wooden alarm clock will activate. It won't bother you.