Features: * Clock with red 7-segment displays in an attractive enclosure * Automatic time base selection (internal or net-frequency controlled 50/60Hz) * Internal time base with fine-tuning adjustment * Select 12h- or 24h-mode for the time display * Equipped with backup battery (3 x AA) in case of power failure * Clock still displays the time in case of power failure Specifications: * Power supply: 9V AC/DC * Dimensions: 3.6" x 1.8" x 4.0"