I've been using these speakers for about 2 weeks and haven't been impressed at all. It seemed like they were ok at first, but I periodically lose the signal to one of the speakers every few seconds or so. I've tried everything to resolve this by the way, taking out the batteries and plugging them into the power cord, even carrying them into the house, near the transmitter, adjusting the volume on the source. Not sure if cell phones are causing the interference but I'll probably return them soon.