Ultrasonic Distance Measurer

1.   Range from 3ft-60ft(0.9m-18.3m).                                                 
2.   Meter, feet or inch conversion.
3.   Three memories for length width,and height measurements.
4.   Addition,Subtraction,Area,and Volume calculation by touch of relative buttons.
5.   Calculator Function.
6.   Calculation for ten specific construction materials.Lt’s only useful for UK and north  America.
7.   Auto power off.
8.LOW BATT display to remind you of changing the battery.
9.   Back-light for use in darkness.
10. One 9V battery required.
11.Unit Size: 155*70*40mm