Count-down from 19:5. Displays hours and minutes. Extra large digits. Easy operation. Loud alarm. Digit height: 0.75 in. Display size: 1.8 x 0.75 in. Unit size: 3.5 x 2.3 x 0.75 in. Power source is one AAA battery. Weight: 1.5 oz. Includes battery, magnet and clip on back.