La Crosse Technology White Atomic Alarm Clock Atomic 12/24 hour time sets itself (hours/minutes/seconds) ; Time alarm with 10 minute snooze duration ; Atomic Calendar: day, month, date (manual set option) Indoor temperature (F/C) ; Indoor humidity (%RH) ; Moon phase DST/WWVB atomic icon ; Low battery icon USB charging port (1A output) for mobile devices (charging cord not included) Temperature & Humidity trend arrows; backight dimmer (high/low/off); Size 5.56" L x 2.2" D x 3.33" H