I would like to stationary operated the speaker as loading and playback device in continuous use with my Galaxy S5. For me, it makes little sense with a battery charge another when the battery at the same time nor to operate a Bluetooth speaker until the phone is charged, the speaker 25% of the energy is no longer operational (especially in Qi obviously are expected as a loss ). The manual is unfortunately a bit poor and does not describe whether one can be connected the device in continuous use and then the USB power supplies both the Qi charger as well as the Bluetooth speaker permanently. She says only that one should not use the Qi charger, as long as the internal battery is charged. A switch to turn off the internal battery does not exist anyway. In the first test of the Bluetooth speaker (USB cable connected), the sound is decent, the unit has then submitted every few seconds beeps that signal according to instruction that the battery is low, for me, it was then the reason to pack again and back to send. The workmanship is very high extent, to the thin plastic film on top, which looks unsightly as it is not smooth but wavy, there is no rubber that prevents the cell phone in front of slides. Quite impressed I was assumed that the Galaxy S5 fits in size exactly to the housing. The 3 button rubber for pairing (also goes over NFC) and volume up / down or forward / backward are also not particularly ergonomic operation. As for the price of almost 100.- not even an AC adapter is included, I think the device simply too expensive and will once a similar model from the company Maxell try.