Acroprint ES900 Atomic Time Recorder. The Acroprint ES900 is versatile, multifunctional time recorder, time stamp, and numbering machine for your office. It automatically identifies employee punches that are before or after normal punching periods by placing a (*) mark on the time card. It can print 13 preset comments including: RCVD, SENT, IN, OUT, CMFD, FILED, PAID, USED, FAXED, VOID, ORIGN, APR'D, and CMPL'D. It can also be configured as a bell ringer with optional signal control. 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.