Dual power capability 110 & 220 volts & 12/24 hour time.

Hi/low dimmer switch.

12-volt bed shaker.

Adjustable tone & volume control up to 113db.

Battery backup in the event of a power outage.

Dual Power & Time features:  Comes with a 110 volt power supply and will work with 220 volt transformers.  Clock also has two switches.  One switch allows user to switch from 50Hz 110 volts to 60Hz 220 volts.  This feature keeps proper time with 110 or 220 volts.  The other switch allows user to select 12/24 hour time.