4-Level Dimmable Display with OFF Option: This digital clock's display offers 4 adjustable brightness levels plus an OFF setting-eye-friendly, with no harsh glare at night yet still bright enough during the day Loud Alarm Clock: Adjustable volume up to 95db with 5 levels, dual alarms, and a 10-minute ringer duration,ok to wake up for really heavy sleepers,adults,teens,kids Outlet Powered And Battery Backup: Powered by an outlet and equipped with 3 AAA battery backup (not included), this simple clock is reliable and ensures that your time is preserved even during power outages User-Friendly Wooden Digital Alarm Clock with Large Digits: This sleek modern electric alarm clock features bold 1.8-inch numbers-easily visible even across the room(Note: Display only lights up when plugged in) Regular Features: 9-minute snooze, 12/24-hour format, and DST Alarm Clock with USB Charger: Features a USB charger port supporting DC 5V/1A output for convenient charging of electronic devices