Note:The battery is a memory battery, the English storage time light is set, and the memory mode can be entered when there is no power supply.Memory mode: With a memory battery installed, it will run automatically when there is no power supply, and remember the latest clock and various setting modes when there is no power supply.The memory battery has no power supply function and can only memorize the time!LED Digital Wall Clock with 3 levels Brightne Alarm Clock Wall Hanging Clock Wall clock Home decorDescriptionFunction:LED time display(the time display 0:00)There are 3 levels of brightne(the default brightne is medium)Night mode with automatic dimmingTotal 3 functional buttons:MODE,UP,DOWNTotal 4 positions time display(12/24 hour modes)The alarm AL display is 6:00Alarm with snooze functionSnooze function,5-60 minutes(The default interval time is 5 minutes)Power:5V(AC adaptor excluded),CR2032 button cell battery( included) for settings back up,USB Cable(included)Time Setting:Pre MODE for 3s to enter time setting, setting order: hour-minute.Alarm Setting:Under alarm mode, pre MODE for 3s to enter time setting, setting order: hour-minute-snooze time. ''AL'' will light up when setting.When the alarm beeps:Pre MODE to active the snooze function.The AL icon will flash.Or pre DOWN to turn off the alarm.The AL icon will turn off.Night Mode:The clock will automatically lower LED brightne under night mode, pre MODE twice times to enter night mode.Pre MODE to turn night mode on/off.When night mode is on, pre MODE to ender night mode setting, setting order: start hour-start minute-end hour-end minute.Brightne Level Setting:3 Brightne levels: Bright, medium, darkDefault brightne level is medium.Pre UP to switch brightne level.Specification:Material: AcrylicColor: As shownDisplay: DigitalBattery: CR2032(included)Size: 23.5*9.3*3.8cmPackage included:1 x LED clock1 x USB cable 1 x User manual Warm Tips:1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. 2. Please allow 1-3cm measuring deviation due to manual measurement.Thanks for your understanding! Wish you a happy shopping!