1[Aluminum Alloy Material] Made of aluminum alloy material, which is wear resistant, exquisite workmanship, delicate touch, and can be used for a long time. 2[Bluetooth Connection] This speaker adopt Bluetooth sound decoding chip, support all Bluetooth device connection, and the receiving distance can be as long as 10 meters. 3[High Definition Stereo] With soft tones, clear high definition stereo, rich subwoofer, which is clear and dynamic, with distinct levels, to meet your various need. 4[Multifunctional] Support U disk, Micro storage card, Micro memory card play, automatic decoding of mainstream sound formats, plug and play, maximum support 32G memory card. 5[Hands Free Call] Support hands free Bluetooth calls, built in noise reduction sensitive microphone, can effectively reduce external noise during calls.1 x Speaker (Battery Included)1 x USB Cable