If you still could link two of these tiny creatures in stereo with your phone ... but since I'm at least for Bluetooth and no solution is found for the first time realized what an antediluvian standard this Bluetooth.
The only (but little pleasing cable solution): A short 3.5 jack RCA cable with the jack in the smartphone. At the RCA jacks (or plugs) are now left and right channels separately to. It includes one for each Lautsprecherchen (too have a mono jack input) each have a RCA jack cable. Of course, in each case only one connector for the left or right (the other hanging listlessly). And voila: a real stereo system!
But as I said. Another cable solution and I want the whole thing have wireless! If anyone knows a better solution: please describe here!