Features: Large Digital Display: 3'' LED Large Digital Display, Clear and Comfortable Visual Sense, it will auto-dim from 10:00 pm-6:00 am. When plugged with USB cable, the LED light will be on always. By pressing the button of ""SNOOZELIGHT"" the display can keep lighting for 5 seconds. Quiet Sleeping Environment: Unlike a Mechanical alarm clock that keeps ticking, affecting the quality of your sleep. We clock is quiet, allowing you to get rid of the noise of the night and sleep peacefully. Insert the USB power cord (not including the adapter) or insert three AAA batteries(not including) to charge the clock. During battery backup, the screen will go black, the alarm and time settings will remain, and the alarm will still sound. When using battery power, can be voice?activated, and the display can be turned on by clapping your hands, and it will automatically go out after 16s. Alarms with Snooze: Alarms make it possible to set two separate wake-up times. Snooze time can be set, do not need manually to turn off the alarm clock. Wake you at different times, make your life easy and more convenient. Product Specification: Type: Digital Alarm Clock Material: ABS Plastic Shell Color: Black Shell Words Color: Green Display Interface Colors: Black Interface or Mirror Interface Display Size: 12cm*6cm Brightness Adjustment: Automatically or Manual Time Format: 12/24 Hour Switchable Snooze Duration: 1-60 Minutes Temperature: -10~50/14F~122F Temperature Mode: /F USB Charging Port: 5V Power by: 3*AAA Batteries(NOT Including) or USB Cable 5 Keys: Modes, Alarm, Up, Down, Snooze/Light Product Size: 12cm x 6cm x 4cm Package Included: 1 x Digital Clock 1 x USB Cable