VELLEMAN PCS100AU PC-SCOPE 12MHz 1 CHANNEL WITH ADAPTER (110V) by Velleman Inc. The PCS100 is a digital storage oscilloscope, using a computer and its monitor to display waveforms. All standard oscilloscope functions are available in the Windows program supplied. Its operation is just like a normal oscilloscope. Connection is through the computer's parallel port, the scope is completely optically isolated from the computer port. Assembled and Tested