Small travel & bedside alarm clock, with a large easy to read display and bed shaker. Dual power capability 110 & 220 volts & 12/24 hour time make this a true travel clock. Clock comes with a 110 volt power supply, but will work with 220 volt transformers. Switch allows user to switch from 50Hz 110 volts to 60Hz 220 volts. Another switch selects 12/24 hour time. One year warranty.