Distance Measurer

Specifications:
1) Range: 0.6 - 15m / 2 - 50ft 
2) Accuracy: 
    a) +/-1% + 1 digit range: <2.5m
    b) +/-0.5% + 1 digit range: >2.5m
3) Meter and foot conversion
4) Working frequency: 40kHz
5) Memory function: 3 memory data for length, width and height
6) Addition or subtraction for measurement data
7) Error: when measurement over range, error appears
8) Auto power off
9) Low batt indication
10) Laser pointer
11) Beep function
12) 1 x 9V battery required
13) Working temperature: 15 - 35oC