I waited for this item - to uses with a Android powered projector I bought on woot (still available, I think) - but unfortunately it came missing the usb dongle that I needed. Not sure if there is another way to connect - but not worth trying. I need the dongle. Not sure if this is a refurb or new (advertised as new) but came packaged as if a refurb. Disappointed… Being returned…
Check the battery compartment for the dongle. Also the box itself. They sometimes use a fancy little slot along the edge.
Why can’t things like this just use Bluetooth? I don’t have any USB ports left for more dongles.

