Just how inexpensive is this inexpensive SPL meter?

When I was researching it for possible inclusion in my RTA work, I seem to recall it was under $50.00. There was a built-in calibration curve for it in SpectraLAB, so I was considering buying one.

My fear was that any microphone made by Radio Shack couldn't possibly have very good frequency response, so I chose to borrow a professional microphone from a friend which also had a built-in calibration curve in the software.

But if we can get some kind of proper auto-EQ working directly on the empeg itself, I'll buy one of those ratshack mics in a heartbeat. Especially if it uses the aux-in jacks... I've got those already run out into my storage compartment, so I wouldn't even need to open the dash to hook up the ratshack device.