LED Digital Alarm Clock With USB Port For Phone Charger Touch-Activited Snooze Features: Function:LED display,Snooze, alarm clock,Outlet Powered And Battery, Dimmer Compatibility: compatible with iphone and android phone charging Brightness: high sensitive light sensor can be used to adjust the brightness automatically according to the ambient light. It can also manually set high, middle and low brightness Memory function: built-in CR2016 button battery, when the external power supply is off, the time and various Settings will remain unchanged, and the time of the external power supply will not be displayed when the power is off, so as not to repeat the Settings next time. Power:5V(AC adaptor excluded),CR2032 button cell battery(included) for settings back up,USB Cable(included) Total 4 positions time display(12/24 hour modes) There are 3 levels of brightness(the default brightness is medium) Display: digital Alarm with snooze function Size:158*55*77mm Material: Acrylic Package Including: 1 x LED clock 1 x USB cable 1 x User manual