Be careful with any investment. What you were offered is called a primary offering. Nothing bad about that. All stocks go through it before they start trading to raise initial capital. http://www.investopedia.com/terms/p/primaryoffering.asp
Not sure what the marketcap will be after all money is raised, but at the current 3m at $4/share, that's still pretty low, only 800k in the float. Most brokerages do not take penny stocks that are under a certain amount. This one should qualify, but you should call and see for yourself before making assumptions.
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