Ultrasonic Distance Meters

Features:
1) Detecting range: 0.4 - 18m
2) Accuracy: (0.5% + 1 digit) in still air
3) Resolution: 0.01m
4) Battery: 9V (6F22) or equivalent
5) Operating temperature: 0 - +50oC
6) Storage temperature: -10 - +60oC
7) Dimension: 14.5 x 7.2 x 3.0cm
8) Weight: about 150g
9) With laser pointer for detecting location
10) Conversion between m / cm and feet / inch
11) Built-in memory stores readings for review
12) Provides calculation of area and volume
13) With alarm function
14) Automatic or manual power-off