Speaker is prima

For my Sony Xperia Z1 and headset I bought these tiny speakers. At first I had difficulties to bring the speaker to sound. Is no description how you have to handle this. The Sony Store in the Sony Center Berlin I had then let me advise. Well, if you know how, then it goes even RuckZuck. Thanks to NFC. The speaker must be charged. Above is a small sign "N". Put on any music phone. Then the speaker with the "N" mark on the smartphone underside something round Herstreifen. When to stop flashing of the small blue spot on the bottom of the speaker, the speaker operates and produces sounds. Everything is based on low volume.
Deduction of points gets the speaker because of not accompanying description of how it should be handled.