"True Wireless Stereo" - The even better sound experience! Finally, the flat sound is over, because from now on there's Bluetooth, which lets your songs play in stereo quality. The TWS function allows two TM042s to be paired, and the clear distribution of sounds between the right and left channels creates a true stereo sound experience! And it's completely wireless. But the TM042 also cuts a fine figure as a stand-alone speaker: the built-in battery allows you to enjoy your favourite music wirelessly anywhere and at any time as well as to make calls with the hands-free function. You can also connect any device with the included AUX-In cable. In addition, you can access your music via a micro-SD card.