ES900 Atomic Electronic Payroll Recorder, Time Stamp and Numbering Machine, Digital Display, BlackMake sure one dead battery doesn't hinder your company's payroll information. Multifunctional machine features battery backup to ensure the perpetual calendar maintains the correct time. Features atomic time that synchronizes time automatically from the U. S. Atomic Clock. Identifies early or late punches with the I Mark to make auditing time cards easier. Over 300 selectable print formats. 1 to 8 digit consecutive numbering, 13 selectable preset