Durable Metal Alarm ClockOur clocks are design with stylish metal shell,which is anti-broken and durable when you accidentally falls.And the Space-saving (3.23"*2.64"*1.14") size let it portable to take anywhere to bedside table,desk,handbag in your home, office ,or traveling. LED Display with 4 Levels of BrightnessClear white digits with 4 levels of brightness from Off/Dim/Medium/Bright to meet the needs of different people in both daylight and nighttime; No more shining display at night for those who are very sensitive to light when sleeping; The time display support both 12/24H time format. Suitable Alarm VolumeThe alarm is super easy to set and turn on/off with intuitive alarm icon ,gradual intensification beeping volume from 70-90dB, which can make a light sleeper enjoy a fresh morning with suitable alarm volume and light. DC Adapter Powered and Backup BatteriesPowered via the USB DC 5V adapter (included) or connect to your laptop, power banks for powering. The built-in 2 AAA batteries for saving all the setting in times of power outrage; The alarm also had the memory function and worry-free the reset problem when there is no power. Extremely Easy to OperateIndependent buttons to set time and alarm, easy for boys, girls, kids, teens, seniors; The dimmer and snooze button is specially designed on the bottom of the clock, saving your worries to grope in the dark of the button, you just need to press the top of the clock to light up the display or snooze. Note:When in battery power ,the screen light will be auto rest if no any action.