Got one of these from my daughter in NZ - what a fantastic little device.
It's a venturi smoke generator, all stainless steel, comes with the air pump, piping, etc.
It needs a small hole (about 1/2") and a couple of screw holes to mount it on the side of anything (smokehouse, BBQ, etc.) plug it into the power, fill with chips, light, watch the smoke pour out.
This is my first time ever smoking anything and it worked flawlessly - giving 4-6 hours of cool smoke on a fill. I smoked bacon, ham, salmon using cherry wood chips and it was a fantastic christmas success. The unit certainly puts out enough smoke to do the job.
Mine cost US$135 and it looks indestructible.