Digital Alarm Clock Alarm Clock Digital Music/Vibration Digital LCD Electronic Alarm Clock Adjustable Sleep Volume Timer functionDisplay hours, minutes, and can choose 12/24 hour format. Can set the hour, minute, second as you like and a maximum of 99 hours 59 minutes 59 seconds.Built-in backlightIf it's not on the lock statue, press any button, the backlight will light up for about 1-2 seconds, very convenient. You can see the time clearly at night.Vibration optionSelect music or vibration to remind you, play music or vibration for about 60 secondsLock functionIf you are in lock mode, turn off all buttons to avoid incorrect operation.Dual alarm2 groups of alarm clocks (AL1 and AL2), can set 2 alarm clocks at the same time. Note: The data is all manual measurement, please please allow 1 - 3cm error, due to the light and display difference, there will be some color difference, depending on the physical object received.