I was looking for a an inexpensive variant of a wireless netzunabhängingen speaker system and here found it. That part is certainly not the "screamer" and for music connoisseurs a "challenge," but you have to bear in mind what price this device is offered here. So I also expect anything special and therefore my expectations were not disappointed. Together with an Android Tablet makes these speakers the what to do - he plays the audio wirelessly again. Together with a projector and the tablet, without any messy cables trötet the part hidden behind the screen and is also space-saving. In contrast, I had ten years ago have to carry a suitcase with me (including distribution, connecting cables, etc.) to a multimedia system to use anywhere. But the projector requires now a network connection. I was on the purchase of this product also realized that I can not tease out the frequency range out of the box via Bluetooth and listening to demanding music would be an absolute pleasure. Here you should for other, more expensive options keep you safe out. The perfect solution is the naive use of the device, unfortunately you have to every time to activate the device at the transmitter. To compensate for the flat frequency response, I advise to use appropriate apps that offer great settings with respect to the frequency correction. Then listening to music sites over a large frequency spectrum transparent (eg N-music player) is. A bass-driven spectrum you should not expect here, especially if one has to rely only on battery power. For this reason, I only four stars.