[Joohoo]

Hello everyone
I Have worked with some code know to get the Vex ultrasonic range finder and I found in my tests that the sonar worked in giving an approximate distance that was to be expected.
The only thing that seems to be the problem is that the sensor will give me a distance of up to 70 inches. does anyone know if this is just because it costs $20 and is only good up-to that point?
//We lost all the documentation