When battery powered,the screen will be automatically sleep after six seconds in order to save energy.
When you need to display the time,you can activate the display backlight. Methods:1/ Voice activation(More than 90 db) 2/Button to activate（Snooze) 3/Vibration the alarm.
When plug in the power,the screen will be in a steady light.

• Display: LCD digital display
• Shell Material:Plastic
• Function:Snooze Function; Sound Function
• Power Type:Battery
• Style:Small;Simple;Backlight,Fashion

Display: LCD digital displayWuKong