Extech CTH10 Radio-Controlled Wall Clock Hygro-ThermometerExtech CTH10 Radio Controlled Wall Clock Hygro Thermometer with Super Large 4. 3" (109mm) Digit Clock Display Radio Controlled Wall Clock Hygro Thermometer with Super Large 4. 3" (109mm) Digit Clock Display Receives Time Code from NIST Radio Station WWVB Automatically adjusts year, date, day, hour, minute, second, and DST Key Features: Receives Time Code from NIST Radio Station WWVB (North American region) Large LCD displays Time, RH%, Temperature,