WARRANTY -- Three manufacturer replacement warranty and 90 days no questions asked return policy.( If have any question, please contact us via message, thanks ). DETACHABLE BASE + WALL HANGING HOLE -- When the clock is installed on the base, it's a desk clock, for desk,bedside,dressing; When the clock is removed from the base, it's a wall clock, which can be installed on the wall through the hanging hole on the back , for bedroom,Office,living room, kitchen. POWER OFF MEMORY -- Mirror clock uses DC-5V/1A USB power supply; Modern clock is equipped with CR2032 battery, when the alarm is disconnected the USB power supply, you can continue to keep the alarm data. ADJUST BRIGHTNESS -- Electronic clock LED display screen has 3 levels brightness: low,medium and high light, you are free to choose the brightness by press the “BRIGHTNESS" button ( 3 levels of brightness, the last one is to turn off the display ) ; If the night mode is ON, this clock will change the brightness to darker automatically, during the nighttime (18:00-6:00). SNOOZE MODE + NIGHT MODE -- Digital alarm clock snooze button is located on the top of the clock and can be easily turned off, allowing you to get 5 to 60 minutes (settable) of extra sleep time; night mode means that the LED automatically enters the lowest brightness display state at night,don't affect your sleep. 6.7" HD LARGE DISPLAY -- Digital clock is equipped with a 6.7 inch large size LED display,you can clearly check the time anywhere in the room.