Traceable® Clock automatically sets itself and is accurate to 1/10,000 of a second. Clock receives a controlling radio signal directly from NIST's atomic clock in Boulder, Colorado. Automatically adjusts for daylight saving time, and leaps seconds (earth rotation wobble corrections). Bright second sweep hand is highly visible. Complete with wall mount, screw, and AA battery. Diameter is 12 inches, depth is 1-1/4 inches. Weight is 1.4 pounds.
*With serialized Traceable certificate from an ISO 17025 A2LA accredited Cal lab