Single day alarm only goes off on the day it’s set, so guests won’t be woken up by someone else’s alarmAuto update for daylight saving keeps the time accurate without the need for manual adjustmentsThe display dimmer with three levels and off switch, lets guests adjust or turn off the brightness12hr/24hr switch allows guests choose their preferred time formatThe included security C-clamp attaches the clock firmly to furniture or fixtures to prevent tampering or theftBattery backup keeps the clock running (included two AAA batteries)ETL listed certification meets strict UL standards, ensuring the clock is tested for safety and reliabilityPassed UL Spill Test for reliable operation in case of accidental liquid spillsIncludes one USB-C and one USB-A port, so guests can charge their phones and other devices