Can I cut hard plastic sheets with this or will it melt them

My experience so far has just been with thin (~0.02") ABS sheets, 0.01" polycarbonate sheets, and a failed attempt with 1/16" polycarbonate. In general the saw does what I need, but I wish it had a bit more power. If you don't have a fence lined up almost perfectly parallel to the blade, the binding (even with 0.02" ABS) becomes severe and slows the blade significantly. When I tried the 1/16" thick polycarbonate I couldn't get the saw to cut through regardless of how parallel was my fence. I've been using a thin, solid carbide blade too.So far I've never had any issue with melting or burning plastic.

is this saw blade ok to cut tubing?

I did not try to cut tubing and this saw blade is not for this purpose. This tool looks OK to cut printed circuit boards

Is there a blade included with the saw? If so which blade?

Yes, a blade is included and the saw is ready to use. It's a general use blade (14 teeth per inch).

Does it work at 220v?

Greetings Christian,Proxxon products are made in Taiwan for the American market and are all wired for 110volts. If your mains are 220volts, you could get a voltage converter to run the saw. If you are thinking of other purchases from the Proxxon tool line, a converter would be a worthwhile investment for your workbench.Here is a suggested transformer producing 300 watts with a very reasonable price from Amazon:https://www.amazon.com/STEP-DOWN-TRANSFORMER-ADAPTER-300W/dp/B0036ZKCAYRegards,Steve Franks