1.cylinder shape design,light,small,compact size 2.aluminum alloy case 3. support bluetooth stereo,hands free call Portable Bluetooth ... speaker with cylinder shape design, the case is made from aluminum alloy material which give it solid build quality, it’s small ... , can connect to laptop/computer, telephone.MP3/MP4…9. With aluminum alloy material design6.Rated power:4 Ohm 3W7.Speaker: 1.75 ...