What I so was not aware, and many others, does not determine the button on the back "next track" & "Previous Track" serve for the title on the Micro SD card to further turn. So it is not possible (to start dH to stop, forward or backward to shift) with this speaker to control the music on your phone via Bluetooth remote. So what any other Bluetooth headset may or example my little Vorgängerbox Logitech Mini BoomBox.
The processing is wertig, the surprisingly high weight makes this impression. The rubberised exterior I know of PC mice kept there maybe one year plan, then you had the abgefummelt. Since one of the speakers is not so often touches such as a mouse, I would imagine that this type of coating there longer maintains it. Now one could complain about the still spongy button which any sense of feedback can miss, but I will let times the church in the village.
The hands-free or REC function I have not tested it because I would buy for this purpose no Bluetooth Box.