USB Charging Port & Memory Function: Alarm clock for bedroom is powered by the USB charging. It doesn't support battery power. If you unplug the charging cable, the screen will turn off. The bedside clocks has a memory function, there is no need to reset while in case of power failure. ( ). 3 Alarm Modes & Snooze : The table clock has alarm function, and there are three modes to meet all your time needs: Monday to Saturday, Monday to Sunday, Monday to Friday. The alarm clock has a snooze function, allowing you to sleep for 5 minutes more. 3-Level Clock Brightness & Night Mode: There are 3 options meet all your needs for day and night which is Bright-Medium-Dim-Off. When you go to sleep, you can adjust brightness or set clock at Night Mode. In the night mode, it will automatically enter the low-light state at night from 18:00 to 5:59 by default. Projection Alarm Clock: OQIMAX Alarm clock provides an ultra-clear projection. You can easily read the time on wall or ceiling while lying in bed. Just pay attention to the direction when you project. Please project on the wall or celling which is on the back of the clock. If project foward, the number is upside down. Mirror LED Display & 12H/24H Format: OQIMAX digital alarm clock, with an 7.8'' Large mirror LED display, is easy for you to read the time. 12 or 24H switch of this alarm clock also can meet your needs. Note: There is a protective film on the screen. Before use, please remove the protective film to avoid the screen looking unclear..