Item Type: Alarm Clock Product Material: Bamboo, Acrylic Battery: 4 x AAA Batteries (Battery Not Included) 1、Function: When using a dry battery, it automatically enters the energy saving mode, you need to press the touchpad to wake up, and when using an external power supply, it enters the constant light mode.  2、Adjustable: Three speed automatic brightness adjustment, automatic brightness adjustment, soft light and no dark, comfortable to accompany every night.  3、Manual: Support multi speed manual adjustment and turn off the screen, you can adjust the appropriate brightness according to your own habits, in the time state, long touch the touch switch for 3 seconds to switch between automatic/manual brightness adjustment.  4、Product Use: Suitable for study rooms, public places, offices, bedrooms, living rooms, kitchens, etc.  5、Comfortable: The volume of modern clocks can be adjusted freely. Don't worry that too many voices will make you feel uncomfortable, or that the voice is too weak to wake you from deep sleep.