Striking in gloss black, the Oregon Scientific RMR383HGA-BK Wireless Indoor/Outdoor Thermo Hygrometer has a generous complement of features. It displays the indoor temperature and humidity and, as reported by the included remote temperature sensor, the outdoor temperature. Trend arrows for temperature and humidity are displayed as well. The RMR383HGA-BK can actually work with up to 3 remote sensors. When an optional remote temperature and humidity sensor is used, the RMR383HGA-BK can also do the following:

• It can display (in addition to outdoor temperature) the outdoor humidity (with trend), heat index (with warning if applicable), and comfort level for the sensor's location.
• It can retain min/max outdoor humidity and heat index values (in addition to temperature) from the sensor for instant pushbutton display.
• If the sensor is for remote Channel 1, the main unit can sound audible high and low humidity alarms (in addition to temperature alarms) for Channel 1. 

With either the included or optional remote, a visible ice warning can be displayed for Channel 1 as well. Rounding out this product's features is a radio-controlled ("atomic") clock with calendar, moon phase, and snooze alarm.

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Styled in black, the RMR383HGA-BK looks very clean and sleek. This is because its control pushbuttons are on the right side panel and on the back. (The time zone switch and a Reset button are in the battery compartment.) It's also because the snooze bar at the top is part of a decorative flange that encircles the case and because the on/off switch for the daily alarm is concealed under the lower right corner of the front panel. To turn the alarm on or off, you simply press the case front where it says ALARM and shows a sound wave symbol.

Important Note: Before you read about the various displays and their options, please be aware that the included THN132N remote temperature sensor does not support humidity readings. Thus, the RMR383HGA-BK cannot display the outdoor (or other remote) humidity, heat index, and comfort level and cannot provide Channel 1 high and low humidity alarms unless you purchase an optional THGR268 or THGN123N thermo-hygro sensor and use it as the Channel 1 remote. If you want to use three remotes, the third can be either a thermo or thermo-hygro remote, depending on whether or not you want humidity and heat index readings from that remote's location. In the description of the Temperature and Humidity Area below, please assume that at least one optional THGR268 or THGN123N is being used and that it is the Channel 1 remote.

The top two lines of the four-line display are the Temperature and Humidity Area. The top line shows the temperature and the second line shows the humidity for the selected location (indoors or a selected remote channel). Temperature and humidity trend arrows (rising, steady, or falling) are also shown. A house icon contains either a dot for indoors or 1, 2, or 3 for the selected remote channel. A waves icon above the house indicates reception of the remote's signal. If high and/or low temperature alarms are set for Channel 1, alarm bell Hi and Lo icons appear in the display. If the Channel 1 remote temperature falls to between 37°F and 28°F (3°C and -2°C), an ice warning icon in the form of a snowflake or ice crystal above the temperature trend arrow flashes on and off. You can option the display to auto-scan between indoors and all active remote sensors at 3-second intervals. You can also press the MEM button to manually toggle between current, maximum, and minimum temperatures and humidity for indoors and all active remote sensors.

The HEAT INDEX button on the back of the RMR383HGA-BK gives you several additional temperature display options. You can display the current temperature or, in its place, the current heat index for the selected remote channel. You can also manually toggle between current/maximum/minimum heat index readings. Another option automatically toggles between current temperature and current heat index.

Between the temperature and humidity display are an outdoor comfort level icon (WET, COMF, or DRY) and a heat index icon (CAUTION, EXTREME CAUTION, DANGER, or EXTREME DANGER) when the index is high. The conditions under which the comfort level icons and heat index icons appear are given in tables in the BAR388HGA User Manual.

Below the Temperature and Humidity Area is the Clock/Alarm Area. The time is shown as hour and minutes in 12-hour format with AM or PM or in 24-hour format. Month and date are shown digitally as MM/DD or DD/MM. The weekday is a two-letter abbreviation in your choice of English, French, German, Italian, or Spanish. The MODE button on the right side of the case lets you display clock seconds as an alternative to the weekday. If the clock has successfully received the WWVB 60 kHz time-synchronization radio signal from the U.S. atomic clock in Colorado, a tower and waves icon appears to the left of the time. You must select your continental U.S. time zone (Pacific, Mountain, Central, or Eastern), and P, M, C, or E is displayed above seconds or weekday. The current moon phase is displayed below seconds or weekday as one of eight icons. These are shown and described in the User Manual. You can view the moon phase for any day from year 2001 through 2099.

The RMR383HGA-BK's atomic clock has a single daily crescendo alarm with 2-minute duration and an available 8-minute snooze function. The set alarm time can be viewed as an alternative to the normal time and calendar display.

One THN132N wireless remote temperature sensor is included with the RMR383HGA-BK, and the main unit can actually monitor up to three temperature or temperature-humidity sensors at a distance of up to 100 feet (30 meters). The THN132N is a non-displaying remote. A red LED on the remote's front panel lights when transmission is occurring. Additional remote sensors can be obtained separately and include the following:

• THGR268. This is a temperature and humidity remote with its own display. You can use this remote if you wish to display the outdoor humidity, comfort level, and heat index and use the Channel 1 high and low humidity alarms.
• THGN123N. This is a non-displaying temperature and humidity remote that, with lithium batteries installed, works down to -40°C/F. You can use this remote if you wish to display the outdoor humidity, comfort level, and heat index and use the Channel 1 high and low humidity alarms.
• THC268. This is a temperature-only remote with its own display and a waterproof probe on a 10-foot (3-meter) cable for use in pools, spas, hot tubs, freezers, soil, etc.

You can select °F or °C for the temperature unit on the optional displaying remotes. The temperature unit selected on the main unit overrides that of the remotes.

The RMR383HGA-BK main unit is designed for free-standing use only and has a non-skid "back foot." The THN132N remote sensor can rest on a horizontal surface, or it can be wall-mounted via a keyhole slot on the back. Please be aware that the small table stand that extends from the back of the remote is an integral part of the battery compartment cover that makes up most of back of the remote. You can hang the remote on a wall with the stand in place. This remote is water-resistant but not waterproof. Choose a mounting location where the THN132N is protected from direct sunlight and direct precipitation.

The main unit uses two AA alkaline batteries, and the remote thermo sensor uses one AA alkaline battery. All batteries must be obtained separately. If the remote will be used in sub-freezing temperatures, a lithium battery is recommended instead of alkaline.

Note: This product comes in a clear plastic blister pack that, once cut open, cannot be resealed. Because opening a blister pack renders the enclosed product unfit for resale, non-defective products whose blister packs have been opened are not returnable. If you receive this product and it is not to your liking (for example, if its appearance does not meet your expectations), please leave the blister pack unopened and contact us for return instructions. Defective products, however, can be returned for replacement. Again, please contact us for instructions.

Features and Benefits:

• It's wireless! Easy setup with no cables to string--remote temperature and optional temperature-humidity sensors send data back to main unit (base station) via 433MHz radio waves.
• Know the the indoor temperature and humidity and the outdoor temperature from the comfort of your home or office.
• With one or two optional thermo-hygro sensors, also know the temperature, humidity, comfort level, and heat index (with warning if applicable) from additional locations--either outdoors or your greenhouse, baby's room, warehouse, wine cellar, or other location.
• Trend arrows indicate Rising, Steady, or Falling for indoor temperature and humidity, outdoor temperature, and, for channels with optional thermo-hygro sensors, outdoor humidity.
• For channels with optional thermo-hygro sensors, three outdoor comfort icons indicate COMF(ortable), WET, or DRY.
• For channels with optional thermo-hygro sensors, four heat index icons indicate CAUTION, EXTREME CAUTION, DANGER, or EXTREME DANGER when appropriate.
• If Channel 1 uses an optional thermo-hygro sensor, audible high and low temperature and humidity alerts can be set for remote Channel 1.
• With either the standard or optional sensor, a visible ice warning is displayed for Channel 1 when the temperature approaches freezing.
• User-selectable °C or °F for temperature displays on main unit. If optional displaying remotes are used, main unit always shows the temperature unit for which it is optioned (°C or °F) even if one or more remote sensors are optioned otherwise.
• Product comes complete with one THN132N temperature sensor--add one or two additional sensors (optional; not included) to monitor up to three remote locations, indoors or out.
• Integral memory stores maximum and minimum temperature, humidity, and heat index readings (indoor and from remotes) for instant pushbutton display.
• Integral radio-controlled clock with calendar and alarm automatically synchronizes itself to the U.S. atomic clock in Colorado and also automatically adjusts for Daylight Saving Time.
• Clock can be manually set if desired.
• An RF (radio frequency) tower-and-wave icon indicates that the clock is receiving the synchronizing radio signals (WWVB, 60 kHz) for time and date.
• Clock displays time in 12-hour format with AM or PM, or in 24-hour format.
• Month, date, and weekday are shown along with the time.
• Two-letter weekday abbreviation is user-selectable for any of five languages: English, French, German, Italian, or Spanish.
• Clock seconds can be displayed instead of weekday.
• Calendar display can show month-date or date-month.
• One of eight moon phase icons is displayed below seconds or weekday.
• Current moon phase or moon phases from year 2001 to 2099 can be displayed.
• Continental U.S. time zone (Pacific, Mountain, Central, or Eastern) is shown as P, M, C, or E.
• Daily 2-minute crescendo alarm has an 8-minute snooze function.
• Maximum transmission range for remote sensors is 100 feet (30 meters).
• Main unit provides low-battery indications for itself and all remotes in use.
• Main unit is free-standing only and is powered by two AA alkaline batteries.
• Remote can be free-standing or wall-mounted and is powered by one AA alkaline or lithium battery.

Specifications: