CP-3007 0.5-18M  Ultrasonic Distance Meter Measurer 

The ULTRASONIC DISTANCE METER + LASER POINTER is a perfect tool to quickly know the distance, area and volume of a room! It can measure distances in a straight-line from 1.5 Feet to 60 Feet. Your distance measurer transmits ultrasonic waves to a point you want to measure. Afterwards, it measures the time taken by the waves to reflect and then calculates and re-transcribes the distance.
 

Specifications:

With laser point aiming
Foot/Meter function button
LCD screen on a luminous background
Auto stop: switches off if you do not press any key for 4 min.
Memory: allows you to measure and to store 3 different measures
Calculation of area and volume.
Addition and Subtraction function: allows you to add or subtract 2 measures.
Clearing of memory function: allow you to delete quickly all the measures stored.
Correction of errors: the distance measurer indicates that a distance measured is either too long, or too short.
Power supply: 1 x 9V Alkaline type 6LR61 Battery (Not included)
Units of Measure: Feet/Meters
Accuracy: +/-0.5%
Frequency: 40 kHz (ultrasonic pickup)
Working temperature: 0to 43
Range: 0.91m to 20m
Color: Yellow
Dimensions (H-P-l): 142 x 73 x 47mm
Weight (without battery): 144.6g
Laser beam: Wattage 1mW (mW =milliwatt)
Wavelength: 650nm (nm =nanometer)