Specieications Oscillator frequency: 32768hz Dimension: 6¾¡á8 Dimension: ø18.5 Time keeping: 45 seconds / month Circuit: c-mos Operating voltage: dc1.25v to 1.65v Operating temperature: -5¡æ to 55¡æ Average consumption current: 2.00µa Battery: 1.55v/ ø6.80 * 2.60 Battery life: 18 months Torque: 5 µ nm.