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OPERATION
TURNING THE MEASURER ON/OFF
To turn on the measurer,press READ.Te measurer turns itself off if no key is pressed within about 30 seconds.
TAKING A MEASUREMENT
1.Press READ to turn on the unit,the laser light on,the distance between the measurer and the point you measured appears.
2.Hold the bottom of measure 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.
SET THE BASE OF MEASUREMENT
The initial base is bottom base,the bottom unit icon will display,if you press the SET key,will change to top base,and the top unit icon will display.
Notes:
The measurement appears for about 30 seconds(or longer if you press another key)
ERROR might appear if you try to measure a distance shorter than the range of 2 feet(0.55m)or longer than 60 feet(18.288meters)
MEASURING TIPS
Some type 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 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 sold and flat,or if you are measuring in a narrow corridor.You might receive a false reading.if this happens,use a sold 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.
CALCULATING AREA AND VOLUME
1.To find the area and volume of a room.measure the Length.And press X/=,measure the Width,then press X/=,then the square icon and the data of area apears,Measure the Height and press X/=the cubic icon and the data of volume appears.
METRIC AND IMPERIAL
The initial unit is METRIC,hold the SET key 3 seconds,the unit can Switch between METRIC and IMPERIAL.
SPECIFICATIONS
Power 1x9V
Unit of measurement Feet or Meters
Accuracy0.5%+1 digit(2-60ft)
Working Frequency 40kHz
Working Temperature 32°Fto109.4°F(0°C to 43°C)
Range 2 to 60ft(0.55 to 18.288m)
Specifications are typical;individual units might vary.
Specifications are subject to change and improvement without notice.
Caution:
The laser emitted from the unit is visible laser of 650m wavelength
Don`t stare into the laser beam and also don`t shoot laser beam to any other`s eyes.
ClassⅡlaser product Output<1mw
Corresponding label is affixed on the ack of the unit.