How can I control the temperature on my GHD?

My new GHD IV styler just arrived couple of days ago after ordering online. I thought we could change the temperature on it, but i realised it said that the temperature is automatically controlled. Does this mean it has a very high temperature? how much does it go up to? Even if I can't control the... show more My new GHD IV styler just arrived couple of days ago after ordering online.
I thought we could change the temperature on it, but i realised it said that the temperature is automatically controlled. Does this mean it has a very high temperature? how much does it go up to?
Even if I can't control the temperature, is it less damaging than the other straighteners?
does it help if I use heat proof spray?
I really don't wanna damage my hair too much.

Thanks in advance! =]
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