The Acu-Rite Model 00736 Indoor/Outdoor Wireless Thermometer displays the indoor and outdoor temperature with a trend arrow, a weather forecast icon, which predicts the weather for the next 12 hours, and a barometric pressure trend arrow. This thermometer also features an alarm clock with calendar display and snooze function plus a bright backlight (momentary, button activated) for the LCD display. The main unit can be mounted on a wall or placed on a shelf, table, or desk.

This wireless thermometer monitors and displays the indoor temperature plus the temperature in up to 3 additional locations by means of the included remote sensor and 1 or 2 additional remote sensors, which are optional and sold separately.  Maximum range of the remote sensors is 100 feet in clear air.  Temperatures can be displayed in either °F or °C (pushbutton-selectable). A temperature trend indicator is displayed for each outdoor/remote-channel temperature. The unit also displays a barometric pressure trend indicator and a weather-forecasting icon that is based on barometric pressure changes and is 70 to 80 percent accurate for the next 12 hours.

The thermometer records minimum and maximum indoor and outdoor/remote temperatures, and these can be displayed at the push of a button. In addition, both high and low temperature alerts can be programmed for both the indoor temperature and any or all of the remote-channel temperatures. When a temperature reaches the preset alerting point, that temperature display flashes and an audible alarm sounds. You can push any button to silence the alarm, but the temperature will continue to flash until it cools or warms (as appropriate) from the alerting point.

Four different weather-forecasting icons can be displayed on this thermometer: Sunny, Partly Sunny, Cloudy, and Rainy. A flashing Rainy icon serves as a storm alert feature to indicate potential severe weather conditions. If the sun icon is displayed, it changes to a moon-and-stars icon at night. If the forecasting icons do not seem to be updating accurately according to the weather, you can manually calibrate the unit so that they update properly (may be necessary if you live at high altitude).

This wireless thermometer also features a precision quartz clock with month, date, and weekday calendar display and a daily alarm with 10-minute snooze function. The button that activates the snooze function also lights the LCD display's backlight. Please note that the clock in this unit is a precision digital quartz clock--not a radio-controlled, or "atomic," clock. The time can be displayed in 12-hour or 24-hour mode, and the clock offers a convenient hour-offset function for easy resetting when Daylight Saving Time begins and ends or if you take the unit to another time zone.

The Acu-Rite 00736 thermometer uses one model of wireless remote temperature sensor: the Acu-Rite 00739 universal sensor. One 00739 is included with the station, and the station accepts up to three. Additional sensors are available separately. The 00739 has a waterproof case and can be wall-mounted via a detachable bracket or placed on a flat surface. This universal sensor features both an integral LCD temperature display for local viewing (selectable for °F or °C) and a detachable, submersible probe on a 10-foot wire. Use the sensor without the probe to monitor indoor or outdoor air temperature wherever the sensor is mounted, or attach the probe and use the sensor to monitor the temperature in a pool, spa, aquarium, or pond, or in soil.  If you live in a very cold climate, you can mount the 00739 remote indoors, and run the probe wire out through a window to prevent battery freezing problems, and to allow reading the outdoor temperature from the front of the remote, indoors.  The probe may also be run into freezers, refrigerators, steel sheds, or out through a steel sided wall where steel construction would otherwise interfere with the signal. 

Integral random security code technology is another feature of this wireless thermometer. The main unit learns the random code of the remote sensor and logs it in as Channel 1. Channels 2 and 3 register in the same way if additional sensors are purchased and used. The remote sensors can transmit up to 100 feet (30 meters) without outside interference, i.e., in an open area. The station has a user-selectable auto-scroll feature by which each active remote sensor's temperature reading is displayed for 5 seconds.

Operating temperature range of the main unit is 32° to 122°F (0° to 50°C). Operating temperature range of the remote sensors is -58° to +158°F (-50° to +70°C).

When outdoor temperatures reach -12°F (-24°C), the manufacturer recommends that you bring the remote sensors indoors and attach their probes to monitor outdoor temperatures by placing the probes out a window. Really cold weather can cause a remote sensor's LCD display and batteries to freeze and malfunction (this is true of any brand of remote sensor that has a display and operates on Alkaline batteries).

All required batteries are included: 2 AA (1.5V) cells for the main unit and 2 AAA (1.5V) cells for the included remote sensor. Both the main unit and remote sensor display a low-battery indication when the batteries become weak. The batteries supplied with the unit are "super heavy duty," but we strongly recommend alkaline cells at replacement time.

If you're looking for a medium-small wireless thermometer with multiple remote capability, weather-forecasting information, an integral alarm clock with calendar and snooze, and some other nice features (including a bright backlight plus memories and alerts), the Acu-Rite 00736 is a great choice. Neither too large nor too small, but big in functionality, the 00736 Wireless Thermometer is perfect for any room in the house--or your office. It comes with a 1-year factory warranty.

• The range of the remote sensors is approximately 100 feet in open air.  The range will be reduced somewhat passing through normal walls, but it usually isn't a problem.  Steel walls or siding may block the signal entirely, in which case you may need to use the wire probe attachment to get around the problem.
• The remote sensor is not designed to be left outdoors at temperatures below  -12°F (-24°C) due to limitations of the batteries and the LCD display.  For operation below these temperatures, it is recommended that the sensor should be mounted indoors, and the included probe wire run out through a window.
• The display light is not on continuously.  To read the display in the dark, press the snooze/light button on the top of the unit.