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4. SNOOZE/LIGHT button:

a. Press to activate the snooze function when alarming

b. Press this button to open or close backlight (with USB line).

Manually Setting the Time:

Press and hold down the 

"MODE"

 button for 2 seconds the hour display starts to flash, use 

“UP”

 or 

“DOWN”

 buttons to set the correct hour.

Press 

"MODE"

 button to confirm your setting, the minute display starts to flash, use 

“UP” 

or 

“DOWN”

 

buttons to set the correct minute.

Press 

"MODE"

 button to confirm your setting and to end the setting procedures, enter the normal mode.

NOTE: 

You will automatically exit settings mode if no buttons are pressed for 20 seconds. Enter settings 

mode again at any time by pressing and holding the 

MODE

 button for 3 seconds.

Setting the Alarm:

a. In normal display mode, press 

“MODE”

 button to enter alarm mode, press and hold the 

“MODE”

 button, 

    

located on the back of the display unit for about 3 seconds to set the alarm time. The alarm hour will begin 

    

blinking on the display where the clock time is usually shown.

b. To adjust the alarm hour, press the 

“UP”

 or 

“DOWN”

 buttons (press and hold to fast adjust). When alarm 

    

hour is set to your satisfaction, press the 

“MODE”

 button to proceed to the alarm minute preference. 

    Press the 

“UP”

 or 

“DOWN”

 buttons (press and hold to fast adjust), press the 

“MODE”

 button again to 

    exit alarm settings

c. To turn the alarm ON or OFF, press the 

“MODE”

 button to enter alarm mode, press the 

“UP”

 or 

“DOWN”

 

    button again to ON or OFF the alarm. The “     ” symbol should show next to the seconds display when 

    alarm is set to ON. Press the 

“UP”

 or 

“DOWN”

 button again to turn off the alarm, when the alarm is set 

    to OFF, the “     ” symbol should not display.

d. When the alarm is in operation it will begin beeping with one short beep and continue with 

    many short beeps if the alarm rings longer than 20 seconds. You can snooze the alarm for 5 

    minutes by pressing the 

SNZ/LIGHT

 button.

Indoor / outdoor temperature and humidity

1. Indoor temperature -9.9°C ~ 50°C (14.2°F ~ 122°F), display LL.L when below -9.9°C and display HH.H 

    when higher than 50°C.

2. Outdoor temperature -50°C ~ 70°C (-58°F ~ 158°F), display -50°C when below -50°C and display 70°C 

    when higher than 70°C.

3. Temperature resolution: 0.1°C

4. Indoor and outdoor humidity range: 20%-95%, display 20% when below 20% and display 95% when 

    higher than 95%.

6. Humidity resolution: 1 %RH

7. When alarm ringing, temperature and humidity test will be stopped.

Accuracy

1. Temperature accuracy:

    -40°C ~ -20°C: ± 4°C

    -20°C ~ 0°C: ± 2°C

    0°C ~ +50°C: ±1°C

Note:

 when the temperature in -50°C ~-40 & 50°C ~ 70°C range, the temperature is only for reference. 

2. Humidity accuracy: +/- 5 % RH (@25°C , 30%RH to 50%RH); 

                                +/- 10 % RH (@25°C , 20%RH to 29%RH, 51%RH to 99%RH)

Setting the Temperature Units:

To switch the temperature measurement between Celsius and Fahrenheit, press the 

“DOWN”

 button which 

is also the C/F option button. You can switch between Celsius and Fahrenheit at any time (except when 

setting other setting options.)

Checking the MAX/MIN temperature and humidity

a. Press the 

“UP”

 button to check MAX/MIN temperature and humidity.

b. Press and hold the 

“UP”

 button to clear the record of MAX/MIN temperature and humidity when display 

    shows MAX or MIN temperature and humidity.

Back Light:

When the display unit is powered by the USB line the back light will always remain on. Press the 

SNOOZE/LIGHT

 button to adjust the brightness of the back light between ON / OFF.

Low Battery Indicator:

If the low battery indicator is displayed on the LCD for either the outdoor sensor or the display 

unit, immediately change the batteries to prevent disruptions in communications of the devices.

Weather Forecast:

a. The unit predicts weather condition of the next 12-24 hours based on the change of outdoor 

    temperature and humidity. The weather forecast is based on outdoor temperature and 

    humidity change and is about 40-45% correct.

The following are icons that will show:

  Sunny                      Partly sunny                    Cloudy                      Rainy                             Snowy

NOTE:

 The weather forecast can be more accurate only under the condition of natural ventilation, in indoor 

conditions, especially in air-conditioned rooms, there will be not accurate.

Placement of the Device: 

Proper placement of both the display unit and the outdoor sensor are critical to the accuracy and 

performance of this product.

DISPLAY UNIT PLACEMENT

Place the display unit in a dry area free of dirt and dust. Display unit stands up right for tabletop/countertop 

use.

Important Placement Guidelines 

a. To ensure accurate temperature measurement, place units out of direct sunlight and away from any heat 

    sources or vents.

b. Display unit and outdoor sensor must be within 99ft (30m) of each other.

c. To maximize wireless range, place units away from large metallic items, thick walls, metal surfaces, or 

    other objects that may limit wireless communication.

d. To prevent wireless interference, place both units at least 3ft (1 m) away from electronic devices (TV, 

    computer, microwave, radio, etc.

OUTDOOR SENSOR PLACEMENT

a. The sensor must be placed outside to observe outdoor conditions. It is water resistant and designed for 

    general outdoor use, however, to prevent damage place the sensor in an area which is protected from the 

    direct weather elements and direct sunshine. The best location is 4 to 8 feet above the ground with 

    permanent shade and plenty of fresh air to circulate around the sensor.

b. Display unit and outdoor sensor must be within 100 feet of each other.

c. In order to maximize the wireless range, place units away from large metallic items, thick walls, metal 

    surfaces or other objects that may limit wireless communications.

d. To prevent wireless interferences, place both units at least 3 feet away from electronic devices (EX: TV, 

    computer, microwave etc.)

TV

(99 feet maximum)

(30 meters)

(0.9 m)

3

 feet

AT

LEAST

APART

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