1[Adjustable Brightness] This LED mirror alarm clock features a SNOOZE LIGHT button for easy adjustment of brightness levels (bright, dim, off), with an automatic dimming feature between 18:00 to 7:00. 2[Voice Activated] When powered by batteries, this digital mirror alarm clock offers a voice activated feature, meaning the display screen can be activated with just a sound like clapping or tapping the table. 3[Power Saving] The LED digital alarm clock automatically turns off after 15 seconds of no operation to save energy, while keeping accurate time, displaying the temperature and humidity, and retaining all settings. 4[Stylish Design] This LED electric alarm clock offers a stylish design that complements your interior decor. The elegant curve of the clock face combined with the eye catching half green and half white LED digits creates a striking look. 5[Multiple Power Options] This digital alarm clock can be powered by three 5V AAA batteries (not included) or a USB power cord (included), providing flexibility in powering options.