idea and excellent first steps, the long term viability remains to be seen, so far, brilliant. goes easily through walls, even in the court, ie outdoors, Vivanco I am anyway nothing negative usual. the sound is tinny and powerfully "outpost" for this small. have the recipient simply plugged into my stereo and speakers since I drag her into every room with (90sqm / 2 floors) and partly outdoors, at idle, when no music is rushing light, with no signal it switches itself off. All in all 5pts! and I have no jetz bissl fun with the new toy cheers Addendum (13.März2010): The unit has a built-in automatic volume restriction, presumably to avoid damaging the unit. + AND +. when it activates transmitters simultaneously with 2, there will be noise. otherwise every 2 units fully intact