Adjustable backlight (hi/low/off) using Included AC adapter or battery operated on-demand and adjustable display mode: full weekday; weekday & date; seconds; or indoor temperature (F) Extra-large, easy to read 2 inch time digits to assist those suffering from memory loss and/or labor with abbreviated words Alarm with 10 minute snooze Wall hang or table standing Note : When plugged in the AC adapter the clock Snooze/light button has 3 settings, One press can turn off the light, Second press can have the backlight on low. And Third press off the Snooze/light button has the backlight on high.