These digital wall clocks contain a pre-tuned internal radio receiver that receives a radio frequency signal generated by the U.S. Atomic Clock in Boulder, Colorado. With an accuracy of 1/10,000 of a second, the clocks automatically adjust to precise time (12 or 24-hr format), daylight savings time, month, date, and day of the week. Also view the ambient temperature, signal strength, and time zone map on the LCD.

Traceable® Products come with an individually numbered Traceable® Certificate provided with each unit, assuring accuracy from our ISO/IEC 17025:2017 (1750.01) calibration laboratory, accredited by A2LA. The certificate indicates traceability of measurements to the SI units through NIST or other recognized national measurement institutes (NMIs) that are signatories to the CIPM Mutual Recognition Agreement. Every Traceable® product undergoes an intense vetting process before it can carry the Traceable name, saving you both time and money by eliminating the need for separate calibration.

Guaranteed to have at least one year of calibration remaining on certificate.