TREVI XR 86 BT , from the XR JUMP line  , is an amplified speaker for listening to music wirelessly from all  Bluetooth devices , such as smartphones, tablets and PCs. Furthermore, using the  TWS (True Wireless Stereo) function,  it is possible to connect two speakers to each other via Bluetooth and increase the total volume of what you are listening to. The Trevi speaker is equipped with an  integrated Mp3 player ,  USB ,  MicroSD ,  Aux-In inputs . You can also use the device as  a speakerphone responder  for telephone conversations. TREVI XR 86 BT is powered by internal lithium battery , easily  rechargeable  via Micro-USB port.