The answer may well depend on the language of your contract, so you'll want to have an employment attorney review it. If you had no information about this product line, I'd certainly question whether or not they have a legitimate interest to protect. The easiest way to get an answer is to tell your old company, in writing, that you have a job offer from this company and tell them that you don't believe it will be in violation of your non-compete. Tell them that, unless they object within, say, 72 hours from the date of your email or fax, that you'll feel free to accept. They'll either say fine, or say they object. Then you'll know whether or not you have a big decision to make. If they say verbally they don't object, confirm that in writing and say you're accepting relying on this representation. But I'd definitely suggest getting specific legal advice on your contract first.