Using the same technology NASA employs to tell time, 1500E time clock wirelessly synchronizes with the National Institute of Standards and Technology's (NIST) atomic clock in Boulder, Colorado. In addition to confirming the time daily, the 1500E automatically adjusts for Daylight Saving Time. No wires, no worries, and no more excuses for being late. As a time clock, the 1500E records employees' in and out times for payroll accounting. As a job clock, it can track project time for accurate costing. And as a document stamp, the 1500E can print the date, time and preset messages on important documents. Case is made of plastic.