It looks like we're not just going to see Apple products being announced at the September 7th event. This is because Beats acquired by Ma in 2014 but still in the market with its own brand let slip that some of its products will also be announced in next week's keynote.
Some vehicles like the iGen.fr received an email (Google Translate) confirming the information that ?a selection of new Beats by Dre products will be unveiled? at the event. The email image was posted by the site, but the company asked for it to be removed.
This news confirms the suspicions we could see in some certificates that talked about the new versions of the iPhone and Apple Watch, an alleged Apple wireless headset called ?AirPods? and such Beats headphones.
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(via iDownloadBlog, CNET)