Positive points:
good sound, and with 7.5W per speaker a good volume.
Signal transmission is good (I am using it outdoors in the patio, with transmitter in a room at the other end of the house).
Speakers appear to be weatherproof (left them outside in torrential rain and still working..)
No interference through other devices.

Negative points:
Very occasionally the signal can get lost. If this happens or the transmitter blanks out then there is an annoying static sound from the speakers.
If operating on batteries: each speakers needs 8 C batteries… so I got 16 C batteries for the two speakers. Batteries hold the charge very long, at least several hours (I got rechargeable batteries – recharge automatically whenever the speakers are plugged into the AC adapter).

Conclusion: great outdoor speakers for a reasonable price, would definitely recommend them !!

I ordered this speaker to have music on my deck. The original plan was to run music (ipod) from my living room receiver to the deck – which is 50 feet and one wall away. I wanted the same music in the living room as on the deck. The signal wasn’t near powerful enough, even trying several different outputs – (and even after adjusting the ipod volume, etc, no luck) – to the point where music just wouldn’t play. I do have an older home with plaster walls, so perhaps this was the problem. I wasn’t expecting the advertised 250 feet, I understand that it would take a perfect scenario, but realistacally, if walls are involved, expect 20-30 feet. In order to use the speaker, I have to place the transmitter and ipod in my kitchen, which is just inside from the deck. The speaker does sound good, and the outdoor volume is adaquate. I wasn’t expecting the wireless sound to be so good. There is ocasional static when someone crosses the line of the signal, or when the sliding door opens/closes. More gripes – once an album is done on the ipod, or any other source, the speaker goes to loud static – and scares everyone. It would be nice if there was an auto mute – the cure of course is to just use a very long play list. Also, there is no sound leveling. Many song files are different, so volumes can change per song. I know this is more of my problem (poor source) and it’s not fair to complain of these things since they aren’t advertised features, but just be aware of them. The best use for this would be if you had a huge deck, and you actually had the transmitter outside, and two of these speakers on the back corners or spread out on the deck. For $70 it’s not bad. I wanted a stationary solution, but now I have to grab my ipod+ charger and move it to the kitchen to have sound outside. Just keep in mind the issues above and that the transmitter needs to be close for clear, static free sound.