This portable speaker is a real buy recommendation. The sound is really great and also it creates an enormous volume. This of course depends on how good the output device or how good the Vera Stronger. On my cheap MP3 player's volume is already really good, but the iPod and the radio can not be compared. Very loud sound leakage. So here I would like to express a genuine buy recommendation. (Acquired in my case here at Amazon for 17) for so little money unbeatable because I durft test already 3 other devices, but which could not keep up. For me the operation with 3 batteries AAA has been the decisive reason to buy, as they are widely available. At a festival, it is for example not so easily possible to charge an internal battery. So, as I said, very loud for its size. Because you need not really think further.