1) Taking a measurement

-Press MEASURE to turn on the unit. The measurer beeps then the distance between the measurer and the point you measured appears.

-Hold the bottom of the measurer flat against a wall about halfway between the floor and ceiling. Be sure there is a clear path to the point you want to measure and that your head or hands do not block the front of the measurer.

-Repeatedly press FEET/METER until FEET appears (to measure in feet ) or until METER appears (to measure in meter).

-Press and hold down MEASURE to take a continuous measurement.

2) Stabilizing the measure

-Your measurer is sensitive to changes in temperature and humidity. Before you use the measurer wait about 15~30 minutes for it to stabilize to the current room’s temperature.

3) Measuring Tips

-Some types of curtains and blinds can absorb sound waves causing measurements to be inaccurate. If you are measuring distances in a room with curtains open the curtains before measuring the distance to a window behind them. Also be sure that the window is closed.

-If there is not a clear path between the points where you are measuring you might receive a false reading from sound waves bouncing off objects such as chairs tables and objects with uneven surfaces. If you are not sure if a measurement is correct move slightly to one side then measure the distance again.

-If the surface of a wall you are measuring is not solid and flat of if you are measuring in a narrow corridor you might receive a false reading. If this happens use a solid surface to measure or move to the center of the corridor.

-To measure a distance longer than 60 feet (18.288meters) select a point in the middle of the room (for example) measure from the center of the room toward each side then add the two measurements.

4) Calculating volume

-To find the volume of a room measure the height width and the length of the room and store each measurement in a different memory location (see Saving a Measurement"). Then press VOLUME the volume calculation result appear.

5) Calculating area:

-Follow these steps to find the area of any two stored measurements.

-Measure the width and length of a room and store the measurements in M1 and M2 (see "Saving a Measurement").

-Press AREA M1 and M2 the area calculation appear.

6) Adding/subtracting stored measurements

-Measure any two dimensions of a room and store the measurements in memory locations 1 and 2 (see “Saving a Measurement”)

-Press ALL MEMORY CLEAR.

-Press M1 + M2 then + to add the measurements or M1 - M2 then - to subtract them. The value of the calculation appears.

-To clear the display and do another measurement press ALL MEMORY CLEAR.

* Specifications:

1) Power Source…1x9V battery(not included)

2) Unit of measurement……Feet or Meters

3) Accuracy……0.5%±1digit (8~60ft)

......1%±1digit (2~8ft)

4) Working Frequency……………………………………….40kHz

5) Working Temp…………32 to 109.4℉(0 to 43℃)

6) Range…………2 to 60ft (0.61 to 18.288m)

7) Size: 65x155x43mm"