10 x 10 x 4 box for sale, brand-new and used.

The following is from the Manual As with any new instrument or equipment, you should practice with some known conditions and familiarize yourself with the controls and to know what kind of results to expect. For example, barely turn on an air line to a point where the sound of escaping air cannot be heard. Now, with the FILTER off, point the Ultrasonic Probe at the air valve from one to two feet away.