Fangrui Product Details 1. Dual Alarms When The Alarm Goes Off, Press The Snooze Button On The Top To Snooze For 10 Minutes. When The Alarm Goes Off, Press Any Button (except The Snooze Button) To Stop The Alarm And Reset The Alarm, And The Alarm Will Go Off The Next Day 2. Brightness Adjustment In Normal Display Mode, Rotate The Roller Switch On The Right To Continuously Adjust The Screen Brightness Mood Light Brightness Adjustment In Mood Light Mode, Rotate The Roller Switch On The Right To Continuously Adjust The Mood Light Brightness Mood Light Color Change Display There Are 10 Different Color Lighting Modes In Normal Time Mode, Press Snooze/nightlight To Turn On The Night Light. Press Color Light Key To Change The Display Color 12/24h Switch Press 12/24h To Switch 12/24h Power-off Memory Function 2xaaa Batteries (not Included) Are Only Used For Power-off Memory, (the Back Battery Is Only Used As Memory) No Need To Set The Time Again When The Power Is Off Usb Power Is On The Screen Is On When Powered By Usb,