Thats the new blue bumble bee 60000, it hums and sucks athe same time. Ha, Ha.
I really dont know what it is? but I do have Larrys base 2045 units and the more I use it the better I like it.I had to many years with the big guys units anything but simple.This basic and simple like me and everyday is a pleasure to use. One of the nicest features is for furniture cleaning with a slower idle with a cable control and not a electronic speed control with only 2 or 3 options.This unit was designed simple a throttle control and a basic vacum line for the chemicals, that it. jz.