Accurate and reliable — The Atomic ES900 automatically synchronizes with time codes transmitted by the National Institute of Standards and Technology and smoothly handles date changes and Daylight Saving Time adjustments. It maintains the correct time when the power is out, thanks to internal battery backup. With the optional Ni-Cd battery pack, the clock remains fully functional (up to 200 punches) even during power outages.

Versatile and flexible — The ES900 offers over 300 print configurations, including 13 preset messages in your choice of six languages and an option for automatic consecutive numbering. Choose from automatic, semi-automatic or manual print operation, left or right hand print, and user-adjustable print font size to accomodate virtually any time card, document or form. The handy clear window and an LED light make it a snap to align cards and documents perfectly every time. The power supply is switchable from 120V to 240V with the flick of a switch.

Smart and secure — For payroll or time and attendance applications, I-Mark, the optional "irregular" mark, identifies early and late punches to speed up time card calculations and improve payroll accuracy. Using the optional Signal Control PC Board, the clock can sound an internal tone or control an external buzzer, bell or horn to signal the start and end of shifts. For added security, your clock's programming is protected with a user-selected four-digit numeric password.