La Crosse Technology WS-8011-UM Digital Radio Controlled "Atomic" clock with Wireless Indoor Outdoor Thermometer (WS8011UM, WS 8011 UM, 757456000473)

La Crosse Technology WS-8011-UM Digital Radio Controlled "Atomic" clock with Wireless Indoor Outdoor Thermometer, Radio-controlled time and date; Indoor and remote temperature(°F or °C); Time alarm; Snooze for alarm; Day can be displayed in English, French or Spanish; Dual LCD screens.

La Crosse Technology's clocks calibrate themselves to the world's most accurate clock every night by receiving WWVB radio transmissions. These transmissions contain time information from the U.S. atomic clock source, operated by the U.S. Commerce Department near Boulder, Colorado. The built-in antenna ensures reliable signal reception up to 2000 miles (3200km) from the WWVB transmitter.

The WS8011UM(B) is black with handsome wood accents in a mahogany finish, and a crystal clear cover over the displays. I'm afraid the picture really doesn't do it justice. It's an impressive looking unit. Its large digital displays provide excellent readability, even from across the room. Similar in appearance to the WS8001UM Moon Phase Clock, this model provides a wireless outdoor temperature reading function in place of the moon phase. This clock can be used as a freestanding unit on a table or shelf, or it can be mounted on a wall.

The LaCrosse Technology WS8011UM Wireless Temperature Atomic Clock

The LaCrosse Technology Wireless Temperature Atomic Clock maintains its incredible accuracy by automatically tuning into the WWVB radio signal. The built-in antenna ensures reliable signal reception up to 2000 miles (3200km) from the WWVB transmitter. As a result, the LaCrosse Technology clock will calibrate to the atomic clock not only throughout the mainland U.S. but also in much of Canada. You need only insert the batteries, wait until the signal is received, and program the desired additional settings. In locations outside of WWVB range, the LaCrosse clock can be manually set and will provide the high degree of accuracy of any quality quartz clock.

In a nutshell, here's how the the LaCrosse clock works: The clock's antenna is specifically tuned for optimal reception of the 60 kHz time signal. The time signal received on the antenna is demodulated by an onboard receiver, which sends the information to the clock's CMOS microprocessor for decoding. Once your clock has automatically set its time for the first time, it ensures continuing accuracy by automatically tuning into the WWVB radio signal once per day at midnight. (If no signal is detected, the clock performs its WWVB check hourly until the signal is found.) As long as your clock is kept within transmitter range, it will continue to display the absolutely precise time, automatically adjusting for summer time/winter time changeovers if the daylight savings time option is ON. Should you move your clock out of transmitter range for an extended period of time, the clock will continue to operate as a highly accurate quartz-controlled clock. Upon re-entering the transmitter range, your clock will correct itself again to the precise WWVB time signal.

The NIST (National Institute of Standards and Technology, Time and Frequency Division) maintains a radio station, WWVB, in Ft. Collins, Colorado. The WWVB radio station derives its signal from the NIST atomic clock in Boulder, Colorado. A team of atomic physicists is continually measuring every second of every day, to an accuracy of ten billionths of a second per day. These physicists have created an international standard, measuring a second as 9,192,631,770 vibrations of a Cesium-133 atom in a vacuum.

WWVB (the station’s identification just like any other radio station) continuously broadcasts time and frequency signals at 60 kHz. The carrier frequency provides a stable frequency reference traceable to the national standard. There are no voice announcements on the station, but a time code is synchronized with the 60 kHz carrier and is broadcast continuously at a rate of 1 bit per second using pulse width modulation. The time code contains the year, day of year, hour, minute, second, and flags that indicate the status of Daylight Saving Time, leap years, and leap seconds.

Outdoor Temperature Transmitter

• Remote transmission of outdoor temperature to clock via 433 MHz signals

• Wall-mounting case

Specifications

• Indoor temperature measuring range:
  32° to 122°F with 0.2°F resolution
  (0° to 50°C with 0.1°C resolution)

• Outdoor temperature measuring range:
  -21.8° to 140°F with 0.2°F resolution
  (-29.0° to 59.9°C with 0.1°C resolution)

• Temperature checking intervals:
  Indoor: every 10 seconds
  Outdoor: every 5 minutes

• Transmission distance:
  82 feet (25m) maximum

• Clock dimensions:
  11.4 inches (29cm) wide
  7.5 inches (19cm) high
  0.98 inch (2.5cm) deep (excluding foldout legs for freestanding applications)
  LCD1 (Time) 5 3/4" L x 2 1/4" H, Digit height 2"
  LCD2 5 3/4" L x 1" H, Digit height 3/4"

• Remote transmitter dimensions:
  2.32 inches (5.9cm) wide
  2.55 inches (6.5cm) high
  0.82 inch (2.1cm) deep

Features

• Radio-controlled time and date

• Indoor and remote temperature(°F or °C)

• Time alarm

• Snooze for alarm

• Day can be displayed in English, French or Spanish

• Dual LCD screens

• Wall hanging or free standing (fold-out stand)

• 12 or 24 hour time mode

• Time zones from GMT to –12 GMTThree letter identification for US time zones

• Actual Size: 11.75 x .75 x 7.5"

• Accurate to 1second per million years

• Sets automatically to WWVB radio signal (manual setting is also possible)

• 12/24 hour time display (hour, minute, second)

• Alarm setting with snooze function

• Calendar display with weekdays in your choice of three languages (English, French, Spanish)

• Time zone setting (13 available)

• Daylight saving time ON/OFF option

• Indoor temperature display

• Outdoor temperature display via wireless remote transmitter

• Both temperature displays in either °F or °C

• Clock powered by two AA alkaline batteries, with normal battery life of about 1 year

• Outdoor temperature transmitter powered by two AAA alkaline batteries, with normal battery life of about 1 year

A-20030321-1171-102

M-20031020-1171-111

M-20040925-1171-117-L

*This item is BRAND NEW - not refurbished. It comes with all manufacturer supplied accessories, and full manufacturer's USA warranty.