Digital radio atomic wall clock displays month, date, day of the week, and time (hours, minutes, and seconds) in a.m./p.m. or 24 hour time. Also displays ambient temperature and relative humidity. LCD features digits 2 1/4" high for visibility from up to 20 feet away. Clock is accurate to 1/10,000 of a second and relative humidity has a 1% resolution. Controlling radio signal from NIST in Boulder, Colorado automatically adjusts clock to precise time, daylight savings, leap year, and leap seconds. Clock features signal indicators including four strength levels; RC synchronise process, weak signal quality, acceptable signal quality, and excellent signal quality. Increase versatility with alarm and snooze options.

Traceable® products have an individually-numbered Traceable® certificate provided with each unit, that assures accuracy from our ISO/IEC 17025:2017(1750.01) calibration laboratory accredited by A2LA. It indicates traceability of measurements to the SI units through NIST or other recognized national measurement institutes (NMI) that are signatories to the CIPM Mutual Recognition Agreement. Each product goes through an intense vetting process before it can carry the Traceable name, thus saving you both time and money by not having to calibrate separately.

• Timing capacity: 24 hours
• Count direction: up
• Resolution: 1 sec
• Accuracy: ±0.0001 sec
• Display: LCD, 2.5" h
• Temperature resolution: 0.1°F/C
• Temperature range: 32 to 113F, 0 to 45C
• Battery type: 2 x AA batteries (included)
• Includes two AA batteries, wall-mount screw, and NIST-traceable calibration certificate with data