Altec Lansing SoundRover 50 Party Speaker

So far I got it and like it.

How? The box says you can. The manual says you can. Nowhere does it tell you how. Bought two of these to create stereo sound for backyard movie nights, but can't find any instruction on how to pair them together. Called the service number, was told by the rep that this model doesn't have True Wireless Pairing. Why does it say it does on the box, in the manual, even right on this webpage? It shouldn't be this hard to get an answer