There are a total of 6 units included, 3 transmitters and 3 receivers.(all tested)

There are 6 power supplies (tested).

There are 3 IR mice (not tested).

Units were tested at a short distance (15 feet ) in order to ensure functionality

of audio and video. I have no reason to believe long range performance would 

be degraded.  Specifications state that max range is 300 feet unobstructed, 

which I did not confirm.